Question

efectuati calculul.........1)2x la a doua + x=0
2)x la a doua -1=0......va rog ajutatima rapid

Answer 1

1.
2x²+x=0
x(2x+1)=0
x=0
x=-1/2

2.
x²-1=0
x²=1
x=1
x=-1

Answer 2

2x²+ x = 0 se da factor comun x , x ( 2x + 1) = 0 ⇒ x = 0 , 2x +1= 0 , 2x = -1 , x = -1/2 ; 2) x ²-1 = 0 , x ²= 1 , x = 1, -1 ;