Question

(x + y) ² = (x + y) (x + y )
=
=

Answer 1

= X² + XY + XY + Y²
= X² + 2XY + Y²

smoga bermanfaat ^_^

Answer 2

(x + y)²= (x+ y)(x + y)

(x + y)(x + y)
x² + xy + xy + y²
x² + 2xy + y²

jadi, hasilnya adalah x² + 2xy + y².