Question

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

Answer 1

Answer:

Step-by-step explanation:

$(a + b)^{2} = (a + b) * (a + b) = a*a + a*b + a*b + b*b = a^{2} + 2ab + b^{2} \\\\Therefore, \\\\(a + b)^{2} - 2ab = a^{2} + b^{2}$