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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
 2 years ago
 2 years 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
 2 years ago
 2 years ago

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

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

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