Question

1) (х+3)(х-2)-(х+4)(х-1)=3х;
(2х+6)(7-4х)=(2-х)(8х+1)+15.
позя плиз

Answer 1

Ответ:

x= -2/5

x= 1

Объяснение:

(x+3)(x-2) -(x+4)(x-1) =x^2+x-6-x^2-3x+4=-2x-2=3x <=> 5x=-2<=>x=-2/5

(2x+6)(7-4x)=-8x^2-10x+42=(2-x)(8x+1)+15=-8x^2+15x+17 <=> 25x =25<=> x=1