Question

Check whether (x – 1) (x +2) = x + 3 is a quadratic equation or not.​

Answer 1

no, it is not

Explanation:

STEP 1: Simplify (x−1)(x+2).

`x^2+x-2=x+3`

STEP 2: Move all terms containing x to the left side of the equation.

`x^2-2=3`

STEP 3: Move all terms not containing x to the right side of the equation.

`x^2=5`

STEP 4: Take the square root of both sides of the equation to eliminate the exponent on the left side.

`x=`±
`√(5)`

STEP 5: The complete solution is the result of both the positive and negative portions of the solution.

`x=√(5) ,-√(5)`