Question

Factorise
(A) x^2+3x+2
(B) x^3+27y^3​

Answer 1

(A): (x+2)(x+1)

(B): (x+9y)(x²-9xy+81y²

(A): x²+3x+2

x²+x+2x+2

x(x+1)+2(x+1)

(x+2)(x+1)

(B): x³+27y³

x³+(9y)³

{since a³+b³=(a+b)(a²-ab+b²)}

(x+9y)(x²-9xy+81y²)