Question

Find the value of the expression a2 – 2ab + b

2
for a = 1, b = -1​

Answer 1

Step-by-step explanation:

$a = 1 \\ b = - 1 \\ = 1^{2} - 2(1 \times - 1) + ( - 1^{2} ) \\ = 1 + 2 + 1 \\ = 4$

Answer 2

Answer:

2a-2ab+b

2×1-2×1×(-1) +(-1)

2-2×(-1) +(-1)

2+2-1

4-1=3

I hope my answer is right