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
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