Question

d) If x = y = (a + b), show that a^2 + b^2 = xy - 2ab.​

Answer 1

Answer:

Step-by-step explanation:

x = y = (a + b)

(a+b)²=a²+b²+2ab

a²+b² =(a+b)²-2ab

=(a+b)(a+b)-2ab

=xy-2ab

=RHS

Proved