Question

its reverse plz excuse​

Answer 1

Mark me brainlest and thank me and follow the photo

Answer 2

Answer:

1.

(a+b)²=a²+b²+2ab

(a+b)²= 52+(2×6)

(a+b)²=64

a+b=√64

a+b = 8

2.

(a+b)²=a²+b²+2ab

8²=a²+b²+(2×-1)

a²+b²=66

3.

x-1/x=9

(x-1/x)²= x²+(1/x)²-2

x²+(1/x)²=81+2

x²+(1/x)²=83