Question

If a + b = 8 and a - b = 2 find 2a2
+ 2b2

Answer 1

Answer:

32

Step-by-step explanation:

given,

a+b=8 equation1

a-b=2 equation2

add equation1 and equation2

then 2a=10

a=5

then substitute a in equation1 or equation2

then b=3

2a2=2 x 5 x 2=20

2 x 3 x 2=12

32