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Brooke2013
Group Title
Solve the equation by graphing
x^2 + 7x + 19 = 0
Choices:)
A.) x = 49
B.) no solution
C.) x = 19
D.) x = 12
Let f(x) = x^2 + 6 and g(x) = x+8/x. Find (g times f)(7)
Choices :)
A.) 55/7
B.) 384/7
C.) 295/49
D.) 63/55
 one year ago
 one year ago
Brooke2013 Group Title
Solve the equation by graphing x^2 + 7x + 19 = 0 Choices:) A.) x = 49 B.) no solution C.) x = 19 D.) x = 12 Let f(x) = x^2 + 6 and g(x) = x+8/x. Find (g times f)(7) Choices :) A.) 55/7 B.) 384/7 C.) 295/49 D.) 63/55
 one year ago
 one year ago

This Question is Closed

etemplin Group TitleBest ResponseYou've already chosen the best response.0
do you know the quadratic formula?
 one year ago

Brooke2013 Group TitleBest ResponseYou've already chosen the best response.0
For witch one ?
 one year ago

Brooke2013 Group TitleBest ResponseYou've already chosen the best response.0
What I have in the question's is all that I have to figure out the answer's.
 one year ago

etemplin Group TitleBest ResponseYou've already chosen the best response.0
for the first one, you can use the quadratic formula, which looks like this: \[x=\frac{ b \pm \sqrt{b^{2}4ac} }{ 2a }\] where your original equation is in the form ax^2+bx+c try this, and see what you get
 one year ago

Brooke2013 Group TitleBest ResponseYou've already chosen the best response.0
Ok, thanks
 one year ago

etemplin Group TitleBest ResponseYou've already chosen the best response.0
for the second one, multiply g and f together. whatever you get, plug in 7 for x, and simplify it try this and see what you get
 one year ago

RadEn Group TitleBest ResponseYou've already chosen the best response.0
for number one. just check the value of D (discriminant), with D=b^24ac if D < 0, it means gives no solution...
 one year ago
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