(x-4)(x-3)+(2+x)(2-x)=x2-7x+12+4-x2=-7x+16=4则7x=12,x=12/7.
(x-4)(x-3)+(2+x)(2-x)=4 x²-7x+12+4-x²=4-7x=4-4-12-7x=-12x=12/7
(x-4)(x-3)+(2+x)(2-x)=x^2-7x+12+4-x^2=-7x+16=4解得x=12/7
负的七分之十二
x=12/7
