Question

Can someone show me a step by step of how a²+b² = (a+b)²-2ab ?​

Answer 1

Explanation:

`(a + b)^(2) = (a + b) * (a + b) = a*a + a*b + a*b + b*b = a^(2) + 2ab + b^(2) \\\\Therefore, \\\\(a + b)^(2) - 2ab = a^(2) + b^(2)`