+1982 |2x + 4| = 14
What is the product of the solutions to the equation?
A) -81
B) -45
C) 0
D) 45
E) 81
If f(x) = 2x^2 and g(x)= x^2 + 2x, which expression represents g(f(x))?
A) 2x^4 + 4x^2
B) 4x^4 + 4x^2
C) 2x^4 + 8x^2
D) x^4 + 4x^3 + 4x^2
E) 2x^4 + 8x^3 + 8x^2
Find f(3).
f(x) = x^2 + 5x - 9
A) 7
B) 10
C) 9
D) 12
E) 15
If h(x) = 2x^4 - 4x^2 - 2x, then h(3)= ?
A) -6
B) 120
C) 192
D) 1146
E) 1434
+128474 l 2x + 4 l = 14 we have two equations to solve
2x + 4 = 14 2x + 4 = -14
2x =10 2x = -18
x = 5 x = -9
So the product of the solutions = 5 * -9 = -45
If f(x) = 2x^2 and g(x)= x^2 + 2x, which expression represents g(f(x))?
g (f(x)) means that we are putting f into g...so we have
(2x^2)^2 + 2(2x^2) =
4x^4 + 4x^2
For the last two, sub 3 into both functions and then evaluate each one
