Question

If x= -2 and y=√12 then 2(3x³+ 2y²)=

Answer 1

Explanation:

Begin by filling in x as -2 and y as √12 in the given expression:

`2(3(-2)^3+2(√(12))^2)`. Work inside the parenthesis first and deal with those exponents:

(-2)³ is the same as (-2)(-2)(-2) which is -8;

(√12)² is the same as (√12)(√12) which is √144 which is 12.

Filling those simplifications in:

`2(3(-8)+2(12))=2(-24+24)=2(0)=0`