X*(7X + 35 - X^2 - 5X) - 4X + X^2 = 14
7X^2 + 35X - X^3 - 5X^2 - 4X + X^2 = 14
- X^3 + 3X^2 + 31X - 14 = 0
F ' = -3X^2 + 6X + 31
-3X^2 + 6X + 31 = 0
D = 36 - 4*(-3)*31 = 36 - 4*(-93) = 36+372=408 V D = 20.1
X1 = - 6 + 20.1 \ - 6 = - 2.35
X2 = - 6 - 20.1 \ -6 = + 4.35
(7-х)(х+5)-х(4-х)=14
7х+35-х(квадрат)+5х-4х+х(квадрат)=14
7х+5х-4х+35=14
8х=14-35
8х=-21
х=-21:8
х=-2.625
X*(7X + 35 - X^2 - 5X) - 4X + X^2 = 14
7X^2 + 35X - X^3 - 5X^2 - 4X + X^2 = 14
- X^3 + 3X^2 + 31X - 14 = 0
F ' = -3X^2 + 6X + 31
-3X^2 + 6X + 31 = 0
D = 36 - 4*(-3)*31 = 36 - 4*(-93) = 36+372=408 V D = 20.1
X1 = - 6 + 20.1 \ - 6 = - 2.35
X2 = - 6 - 20.1 \ -6 = + 4.35
(7-х)(х+5)-х(4-х)=14
7х+35-х(квадрат)+5х-4х+х(квадрат)=14
7х+5х-4х+35=14
8х=14-35
8х=-21
х=-21:8
х=-2.625