Question

(x+y) (2x+y) + (x+2y (x-y) plz solve​

Answer 1

$(x + y) (2x + y) + (x + 2y)(x- y) \\ 2x {}^{2} + 3xy + y {}^{2} + x {}^{2} + xy - 2y {}^{2} \\ = 2x {}^{2} + x {}^{2} + 3xy + xy + y {}^{2} – 2y {}^{2} \\ = 3x {}^{2} + 4xy - ya$