Question

Cum aratai ca o ecuatie de genu x(x+3) = (x+1)la patrat.

Answer 1

x la patrat + 3x = x la patrat + 2x +1
3x =2x+1
3x-2x=1
x=1

Answer 2

$x(x+3)=(x+1)^2 \\ x^2+3x=x^2+2 \cdot x \cdot 1+1^2 \\ x^2+3x=x^2+2x+1 \\ x^2+3x-x^2-2x=1 \\ x=1$