С 417 по 428......плиз...
417
2X^2 + 3X - 2 = 0
D = 9 - 4*2*(-2) = 9 + 16 = 25
VD = 5
X1 = (-3+5)4 = 24 = 12
X2 = -84 = - 2
418
3X^2 + 8X - 3 = 0
D = 64 -4*3*(-3) = 64+ 36=100
V D = 10
X1 = - 8 + 10 6 = 26 = 13
X2 = -186 = - 3
419
-X^2 + 2X + 8 = 0
D = 4 - 4*(-1)*8 = 4 + 32 = 36
VD = 6
X1 = - 2 + 6 - 2 = 4-2 = - 2
X2 = -8-2 = + 4
420
-X^2 + 7X - 10 = 0
D = 49 - 4*(-1)*(-10) = 49-4*10 = 9
VD = 3
X1 = - 7 + 3 - 2 = -4-2=+2
X2 = - 10-2 = + 5
421
9X^2 -6X + 1 = 0
D = 36 - 36 = 0
X = 6 18 = 13
422
4X^2 +4X + 1 = 0
D = 16 - 16*1 = 0
X = - 4 8 = - 12
423
-X^2 +7X + 8 = 0
D = 49 - 4*(-1)*8 = 81
V D = 9
X1 = - 7 + 9 - 2 = 2 -2= - 1
X2 = - 16-2 = + 8
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