a² = 9, b² = 16 হলে (a+b) = কত?

a² = 9, b² = 16 হলে (a+b) = কত?

A 7

B 25

C 13

D 12

Solution

Correct Answer: Option A

a² = 9

a = ± 3

আবার,

b² = 16

b = ± 4

এখন, a+b = 3+4 আবার, -3 - 4

= 7 অথবা -7

= ± 7