Question

2x(x+1)=x+3
por favor​

Answer 1

$2x\left(x+1\right)=x+3\\2x^2+2x=x+3\\2x^2+2x-3=x+3-3\\2x^2+2x-3=x\\2x^2+2x-3-x=x-x\\2x^2+x-3=0\\x_{1,\:2}=\frac{-1\pm \sqrt{1^2-4\cdot \:2\left(-3\right)}}{2\cdot \:2}\\x_{1,\:2}=\frac{-1\pm \:5}{2\cdot \:2}\\x_1=\frac{-1+5}{2\cdot \:2},\:x_2=\frac{-1-5}{2\cdot \:2}\\x=1,\:x=-\frac{3}{2}$

• x = 1
• x = -3/2

Answer 2

2x+1x=x+3

2x+1x-x=3

3x=3

x=3÷3

x=1

espero ter ajudado :)