Question

Write the identities of (a+b)) and (a-b)2​

Answer 1

Answer:

1.) a^2+2ab+b^2

2.) a^2-2ab+b^2

Step-by-step explanation:

1.)

=(a+b)^2

=(a+b)(a+b)

=a(a+b)+b(a+b)

=a^2+ab+ab+b^2

=a^2+2ab+b^2

2.)

=(a-b)(a-b)

=(a-b)(a-b)

=a(a-b)-b(a-b)

=a^2-ab-ab+b^2

=a^2-2ab+b^2