Question

i) (a+b)²
= a² +
2ab +b²
where a=–1
b=–2​

Answer 1

Answer:

9 please mark me as brainliest if possible

Step-by-step explanation:

(-1)^2+{2×(-1)×(-2)}+(-2)^2

1+4+4

9

Answer 2

a = -1

b = -2

(a + b)² = ( -1 +(-2))²

= ( -1 -2)²

= ( -3 )²

= 9

a² + 2ab + b² = (-1)² + 2(-1)(-2) + (-2)²

= 1 + 4 + 4

= 9

ie , ( a + b)² = a² + 2ab + b²