Х^2+2х-35=0 х^2-х-42=0

Question

Х^2+2х-35=0
х^2-х-42=0

Comments

X^2+2x-35=0(X+7)(X-5)=0(X+7)=0 (X-5)=0X1=-7 X2=5

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X^2-X-42=0(X+6)(X-7)=0(X+6)=0 (X-7)=0X1=-6 X2=7

Answer 1

Х²+2х-35=0
Д=4+140=144=12²
х(1)=(-2+12)/2=5
х(2)=(-2-12)/2=-7

х²-х-42=0
Д=1+168=169=13²
х(1)=(1+13)/2=7
х(2)=(1-13)/2=-6