Question

a2+b2+2ab-a2+b2-2ab

Answer 1

Answer:

A2+b2+2ab - A2+ b2 -2 ab

+A2 and -a2 will cancel

+2ab and -2ab will cancel

we are left wid b2+b2

so the answer is 2(b2)

Answer 2

Answer:

${a}^{2} + {b}^{2} + 2ab - {a}^{2} + {b}^{2} - 2ab \\ = {a}^{2} - {a}^{2} + 2ab - 2ab+ {b}^{2} + {b}^{2} \\ = {b}^{2} + {b}^{2} \\ = 2 {b}^{2}$