Question

Х^2 - 14х - 32 =0
5х^2 - 12х +7 =0
-2х^2 +х + 15 =0
4х^2 +х - 33 = 0

Answer 1

1)D=196-4×1×(-32)=196+128=324
x1=14-18/2×1=-2
x2=14+18/2×1=16
Ответ:x1=-2;x2=16