РЕШИТЕ УРАВНЕНИЕ (5+Х)(4-Х)-(4+Х)(3-Х)=2-Х

Question

РЕШИТЕ УРАВНЕНИЕ (5+Х)(4-Х)-(4+Х)(3-Х)=2-Х

Answer 1

(5+x)(4-x)-(4+x)(3-x)=2-x
(20-5x+4x-x^2)-(12-4x+3x-x^2)=2-x
20-x-12+x=2-x
x=12-20+2
x=-6