Question

Simplify the (9x+8x)(4y_4x)

Answer 1

(9x+8x)(4y-4x)
=(9x×4y)+(9x×-4x)+(8x×4y)+(8x×-4x)
=36xy + (-36x^2) + (32xy) + (-32x^2)
=98xy - 98x^2