1,4x³ - 2,6x² + 2 при x=-1
1,4(-1)³ - 2,6(-1)² + 2 = -1,4 - 2,6 + 2 = - 4 + 2 = -2
10-4(2x+5)=6y-13
4y-63=5(4x-2y)+2
4y-63=5(4x-2y)+2
4y-63-20x+10y-2=0
14y-65-20x=0
x=0.7y-3.25
10-4(2x+5)=6y-13
3-8x-6y=0
3-8*(0.7y-3.25)-6y=0
3-5.6y+26-6y=0
29-11.6y=0
y=29/11.6
y=2.пятых
14y-65-20x=0
14*2.5-65-20x=0
-30-20x=0
x=-30/20
x=-1.5
1,4*x^3-2,6*x^2+2
x=-1
1,4*(-1)^3-2,6*(-1)^2+2=-1,4-2,6+2=-2