Question

a) (x+2)(3x - 5)-3(x + 1)(x-2);
b) (x-4)(4x + 1)- 4(x + 2)(x - 1);
c) (x-2)(2x + 3)-x(x + 7)-(x + 1)(x - 1);
d) (x-3)(2x + 3)-2x(x - 5)-(x + 2)(x - 2);
+ 2)(x-3).
e) (x-2)(2x+3)-5x(x-1)-(x+2)(x-3)

Answer 1

) (x+2)(3x-5)-3(x+1)(x-2)=x(3x-5)+2(3x-5)-3[x(x-2)+1(x-2)]
=3x²-5x+6x-10-3(x²-2x+x-2x)
=3x²-x-10-3(x²-3x)
=3x²-x-10-3x²+9x
=8x-10
c) (x-2)(2x+3)-x(x+7)-(x+1)(x-1)=2x²+3x-4x-6-x(x²-1)
=2x²-x-6-x³+x
=-x³+2x²-6



succeeess