Найдите корень уравнения 2x(8x-4)-(4x-2)(4x+2)=-12
2х(8х-4) - (4х-2)(4х+2) = -12 16х² - 8х - ( (4х)² - 2²) = -12 16х²- 8х -16х²+4=-12 -8х=-12-4 -8х=-16 х=(-16) : (-8) х= 2 ============================ 2*2(8*2-4) -(4*2-2)(4*2+2) =-12 4* 12 - 6*10=-12 48-60=-12 -12=-12
2x(8x-4)-(4x-2)(4x+2)=-12 16х²-8х-(16х²-4)+12=0 16х²-8х-16х²+4+12=0 -8х+16=0 -8х=-16 х=2