Question

If f(x) =2x^2 -4 find (-5)•f(x)

Answer 1

ANSWER

$- 5 \bullet \: f(x) = - 10 {x}^{2} + 20$

EXPLANATION

The given function is

$f(x) = 2 {x}^{2} - 4$

$- 5 \bullet \: f(x) = - 5( 2 {x}^{2} - 4)$

Expand the parenthesis using the distributive property to get,

$- 5 \bullet \: f(x) = - 10 {x}^{2} + 20$

Therefore if $f(x) = 2 {x}^{2} - 4$, then $- 5 \bullet \: f(x) = - 10 {x}^{2} + 20$

Answer 2

Answer:

(-5)f(x)= -10x^2.

Step-by-step explanation:

If f(x) = 2x^2

We need to find (-5)f(x) = (-5) (2x^2) = -10(x^2) = -10x^2.

To solve this problem you just need to multiply (-5) by "2" which is the factor that multiplies the term "x^2"