Question

已知(19z-31)(13x-17)-(13x-17)(11x-23)可分解因式成8(ax+b)(x+c)其中a、b、c

Answer 1

(19x-31)(13x-17)-(13x-17)(11x-23)

=(13x-17)(19x-31-11x+23)

=8(13x-17)(x-1)

a=13,b=-17,c=-1

a+b+c=-5