Question

A) (-7)2 +(+9)2
B) (-4)2 +(+2)4

Answer 1

A) 
(-7)² + (+9)² = 
(-7).(-7) + (9).(9)
49+81 = 
130. 

B) 
(-4)²+ $2^{4}$

(-4).(-4) + (2.2.2.2)
16 + 16 =
32

Answer 2

a) 
= (-7)² +(+9)²
= 49 + 81
= 130
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b)
= (-4)² +(+2)⁴
= 16 + 16
= 32