Question

Nomor 10 tolong bantu jawaban beserta caranya, terimakasih.

Answer 1

X^2 - y^2 + 2xy
=(2-√3)^2 - (2+√3)^2 + 2[(2-√3)(2+√3)]
= (4-3) - (4+3) + 2(4-3)
= 1 - 7 + 2
= -4