Question

Factorise:x^2+3xy-18y^2​

Answer 1

Answer:

(x+6y)(x-3y)

Step-by-step explanation:

$x ^{2} + 3xy - 18y {}^{2} \\ {x}^{2} + 6xy - 3xy - 18 {y}^{2} \\ ( {x}^{2} + 6xy) + ( - 3xy - 18 {y)}^{2} \\ x(x + 6y) - 3y(x + 6y) \\ (x + 6y)(x - 3y)$