Question

Rezolvați ecuatiilr:
a)2x(x-1)=10-2x
b)x(x+1)=x+2
c)x²+x+3=3+x

Answer 1

a) 2x^2 -2x = 10 -2x 
2x^2 -10 =0 
2x^2 = 10 
x^2 = 5 
x1 = 5 
x2 =-5

b) x^2 +x = x +2 
x^2 = 2
x1= 2
x2=-2

c)x^2 = 0
x=0