Question

«С» 1.Решите уравнения:
а) х^2 + 1/7 х = 0; б) 2х^2 – х = 0.

Answer 1

A) X^2+1/7x=0
X(x+1/7)=0
X1=0
X2+1/7=0
X=-1/7
B) 2x^2-x=0
X(2x-1)=0
X1=0
2x-1=0
2x=1
X2=1/2=0,5

Answer 2

$x^2+ frac{1}{7} x=0\ x(x+ frac{1}{7} )=0\ x_{1}=0\ x_{2}=- frac{1}{7}\ \ 2x^2-x=0\ x(2x-1)=0\ x_{1}=0\ x_{2}= frac{1}{2}$