Question

. Find the product: (8x-3y)²

Answer 1

(8x-3y)(8x-3y)

Know how to FOIL?

Answer 2

(8x-3y)(8x-3y)
64x²-24xy+24xy-9y²
64x²-48xy-9y²

Answer 3

Close. A negative times a negative is positive, so (-3y)(-3y) = +9y^2

Answer 4

thank you

Answer 5

Also, you can use the Binomial Theorem to know that in general,
(a+b)^2 = a^2+2ab+b^2
So
(ax+by)^2 = a^2x^2+2abxy+b^2y^2
And
(ax-by)^2 = a^2x^2-2abxy+b^2y^2