(x² + 1)(x - 2) - x³ = - 2x²
x³ - 2x² + x - 2 - x³ + 2x² = 0
x - 2 = 0
x = 2
<span>80+0,4*(-10)</span>³<span>=80+0.4*(-1000)=80+(-400)=-320</span>
(3x+4)(x-10)+(10-x)(x-8)=0
3x^2-30x+4x-40+10x-80-x^2+8x=0
2x^2-8x-120=0
2 (x^2-4x-60)=0
2 (x^2+6x-10x-60)=0
2 (x×(x+6)-10(x+6))=0
2 (x-10)×(x+6)=0
(x-10)×(x+6)=0
x-10=0
x+6=0
x=10
x=-6