Question

3) Factorise x2+2xy+y2-4z2​

Answer 1

Answer:

(x+y+2z)(x+y-2z)

Step-by-step explanation:

$(x+y)^{2}-(2z)^{2} \\that is a^{2}-b^{2} = (a+b)(a-b)\\(x+y+2z)(x+y-2z)$