A community for students. Sign up today!
Here's the question you clicked on:
 0 viewing
 2 years ago
Use the quadratic formula to solve the equation.
x^2 – 7x – 6 = 0
Show work please.
 2 years ago
Use the quadratic formula to solve the equation. x^2 – 7x – 6 = 0 Show work please.

This Question is Closed

lilg132
 2 years ago
Best ResponseYou've already chosen the best response.0\[x = \frac{ b \pm \sqrt{b ^{2} 4ac} }{ 2a}\]

kirk.freedman
 2 years ago
Best ResponseYou've already chosen the best response.0yes it is an exponent

lilg132
 2 years ago
Best ResponseYou've already chosen the best response.0x2 = a 7x = b 6 = c x2 = 1 7x = 7 6 = 6

tcarroll010
 2 years ago
Best ResponseYou've already chosen the best response.1\[x = \frac{ b \pm \sqrt{b ^{2}4ac} }{ 2a }\]where a=1, b=7, and c =6 This is because your equation is in the standard form of ax^2 + bx + c = 0. So, now, just make the substitutions.

kirk.freedman
 2 years ago
Best ResponseYou've already chosen the best response.0Hmm, ok thanks, let me work this out and I will reply to what I got to check if it is right.

tcarroll010
 2 years ago
Best ResponseYou've already chosen the best response.1Hint: after you make your substitutions, pay special attention to the expression within the radical (the square root sign). You will see that the numbet in the radical is positive, so you will have two real solutions. But your final solution will have a radical in it.

winterfez
 2 years ago
Best ResponseYou've already chosen the best response.0dw:1354234621716:dw

tcarroll010
 2 years ago
Best ResponseYou've already chosen the best response.1Are you able to identify the variables a, b, and c and make the substitutions?

kirk.freedman
 2 years ago
Best ResponseYou've already chosen the best response.0Yes, I got to the step that winterfezz last showed, but I don't know what to do now

tcarroll010
 2 years ago
Best ResponseYou've already chosen the best response.1Start with the expression within the radical. Start with (7)^2. That is the same as 7^2.

winterfez
 2 years ago
Best ResponseYou've already chosen the best response.0dw:1354234898685:dw you get 2 answers

tcarroll010
 2 years ago
Best ResponseYou've already chosen the best response.1And when you have a negative number times a positive number, the product will be negative.

tcarroll010
 2 years ago
Best ResponseYou've already chosen the best response.1So, can you determine (7)^2 ?

tcarroll010
 2 years ago
Best ResponseYou've already chosen the best response.1(7)^2 is the same as (7)(7) and that is the same as (7)(7)

kirk.freedman
 2 years ago
Best ResponseYou've already chosen the best response.0Yes, tcarroll, I know all that basic math stuff xD I am at the part where I have dw:1354235055422:dw

tcarroll010
 2 years ago
Best ResponseYou've already chosen the best response.1That's good!. Because that is your final answer! Well done!

kirk.freedman
 2 years ago
Best ResponseYou've already chosen the best response.0So I do not simplify it further?

tcarroll010
 2 years ago
Best ResponseYou've already chosen the best response.1That's as far as you can take it.

tcarroll010
 2 years ago
Best ResponseYou've already chosen the best response.1It is customary to leave it with the + sign

kirk.freedman
 2 years ago
Best ResponseYou've already chosen the best response.0Ok, so no decimal needed, I just leave it as this?

tcarroll010
 2 years ago
Best ResponseYou've already chosen the best response.1That's good just like that.

kirk.freedman
 2 years ago
Best ResponseYou've already chosen the best response.0Thank both of you very much!:)

tcarroll010
 2 years ago
Best ResponseYou've already chosen the best response.1\[\frac{ 7\pm \sqrt{73} }{ 2 }\]Like that

tcarroll010
 2 years ago
Best ResponseYou've already chosen the best response.1You're very welcome!
Ask your own question
Ask a QuestionFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.