Question

expend the following:(x-3y)sqaure​

Answer 1

Answer:

(x-3y)^2

=x^2-2×x×3y+9y^2

=x^2-6xy+9y^2

Answer 2

(x-3y)²

Using identity (a-b)² = a² + b² -2ab

(x-3y)²

= x² +(3y)² -2× x ×3y

= x² +9y -6xy