a. 4x(3x²-5x+y)=12x³-20x²+4xy
b. 3x(5/6xy-4x-5)=5/2x²y-12x²-15x
c. -4x(3x-1)=-12x²+4x
d. (3x-1)(4x+2)=12x²+6x-4x-2
12x²+2x-2
e. (2x-5)(3x-2)=6x²-4x-15x+10
6x²-19x+10
f. (4x-5)(x²-2x-3)=4x³-8x²-12x-5x²+10x+15
=4x³-13x²-2x+15
g. (3xy-5)(4x-y)=12x²y-3xy²-20x+5y
h. (2x-3)²=4x²-12x+9
i. (3x+4)²=9x²+24x+16
m. (2x+3)³=8x³+36x²+54x+27