решите уравнение (5х-1)(х+2)+3(х-4)(х+4)=2(2х+3)²-8

(5х-1)(х+2)+3(х-4)(х+4)=2(2х+3)²-85х²-х+10х-2+3(х²-4х+4х-16)=2(4х²+6х+9)-85х²-х+10х-2+3(х²-16)=8х²+12х+18-85х²-х+10х-2+3х²-48=8х²+12х+18-85х²-х+10х+3х²-8х²-12х=18-8+2+48-3х=60х=-20