Evaluate and simplify the
expression when a=2 and b=4.
4a + 2b2 – 2(a – 3b) = [?]

I think the answer is : 44

a=2 b=4

Step-by-step explanation:

step 1:

substitute each 'a' with a 2, and every 'b' with a 4.

example:

(4 × 2 ) + (2 × 4 ×2) - 2 ( 2 - {3 × 4})

step 2:

solve each number that had a variable (4a, 2b2, 3b)

example:

4a = 4 × 2 = 8

3b = 3 × 4 = 12

2b2= 2 × 4 × 2 = 16

step 3:

solve left to right, but do ( ) first

follow the rules of PEMDAS

• 8 + 16 - 2( 2 - 12)

2 - 12 = -10

• 2 × -10 = - 20

• 8 + 16 = 24

• 24 -(-20) = 44