Question

4x的2次方-(3x的2次方+2x-2)+2(3x+3/2x的2次方-2x的3次方)-1,x=503

Answer 1

4x的2次方-(3x的2次方+2x-2)+2(3x+3/2x的2次方-2x的3次方)-1

=4x²-(3x²+2x-2)+(6x+3x²-4x³)-1

=4x²-3x²-2x+2+6x+3x²-4x³-1

=4x²+4x-4x³+1

=1+4x+4x²-4x³

=1+4x[1+x-x²]

=1+4x[1+x(1-x)]

=1+4*5[1+5(1-5)]

=1+20[1+5(-4)]

=1+20[1-20]

=1+20(-19)

=1-380

=-379