Question

find all real values of x such that f(x)=0
f(x)= x^2 + 20x +99

Answer 1

(x+9)(x+11)
x = -9
x = -11
f(-9) = 0
f(-11) = 0

Answer 2

thanks so much! can youhelp with this one also? :
Find the domain of the function: \[\frac{ 12 }{ x ^{2}-7x }\]

Answer 3

Domain = all real numbers, where x doesn't equal 0 and x doesn't equal -7

Answer 4

thanks!!!

Answer 5

ok I have another 1 I just have to draw the graph. one minute.

Answer 6

okay

Answer 7

what is the domain and range of this graph