Question

(x-2y)(x-3y) expand using standard formulae​

Answer 1

(x+a)(x+b)= x²+(a+b)x+ab

a= -2y , b=-3y

(x-2y)(x-3y)= (x)²+{(-2y)+(-3y)}x+ (-2y)×(-3y)

= x²+{-5y}x +6y²

= x²-5xy+6y²