Question

2x(x-5)-x(3+2x)=26

Answer 1

\(2x^2-10x-3x-2x^2-26=0\)

\(-13x-26=0\)

\(x=-2\)

Answer 2

Answer 3

\(\Leftrightarrow2x^2-10x-3x-2x^2=26\)

hay x=-2

Answer 4

\(2x\left(x-5\right)-x\left(3+2x\right)=26\)
⇔\(2x^2-10x-\left(3x+2x^2\right)=26\)
⇔\(2x^2-10x-3x-2x^2=26\)
⇔\(\left(2x^2-2x^2\right)-\left(10x+3x\right)=26\)
⇔\(-13x=26\)
⇔\(x=\dfrac{26}{-13}\)
⇔\(x=-2\)