Question

If x+y=9 and x-y=3 then the value of 2x2+2y2.

Answer 1

Answer:

Step-by-step explanation:

X+y=9

X-y=3

We should add

2x=12

X=6

Substitute x=6 in x+y=9

6+y=9

Y=3

Given question

2x^2+2y^2

2(6)^2+2(3)^2

2×36+2×9

72+18

90

please tell me if I did anything wrong