Question

A) 5x² (6x -3y)=
b) (2x-2)(x + 5)=
c) (x -5 )(x² - 4x + 20 )=

Answer 1

A.30x³-15x²y
b.(2x-2)(x+5)
=2x(x+5)-2(x+5)
=2x²+10x-2x-10
=2x²+8x-10
c.(x-5)(x²-4x+20)
=x(x²-4x+20)-5(x²-4x+20)
=x³-4x²+20x-5x²+20x-100
x³-4x²-5x²+20x+20x-100
=x³-9x²+40x-100