Question

HELP ASAP/NOW....NO JOKES OR LINKS!!!!!!

what is the vale of the expression -2x^2-4x+10 when x= -3

A. -20

B. 16

C. 40

D. 4

Answer 1

Answer:

D.  4

Step-by-step explanation:

Given expression:

$-2x^2-4x+10$

To find the value of the expression when x = -3, substitute x = -3 into the expression:

$\implies -2(-3)^2-(-3)x+10$

Apply exponent rule  $(-a)^2=a^2$:

$\implies -2(3^2)-4(-3)+10$

$\implies -2(9)-4(-3)+10$

$\implies -18-4(-3)+10$

Apply rule $-(-a)=a$ :

$\implies -18+(4)(3)+10$

$\implies -18+12+10$

Add/subtract from left to right:

$\implies -6+10$

$\implies 4$

Answer 2

Let's find

• -2x²-4x+10
• -2(-3)²-4(-3)+10
• -2(9)+12+10
• -18+22
• 4