Your friend Alex was solving the equation 2x^2+3x=20 and the work below. Tragically, she made an error in her work. First, explain her error (and why), then fix her mistake by redoing the problem correctly

Her error is that For solving by Completing the square method.

She has not made the Coefficient of x² as 1.

Therefore,

Step-by-step explanation:

Alex was solving the equation

She is solving for x by Completing the square method

Her error is that For solving by Completing the square method

First step is to make Coefficient of x² as 1 ( one )

She has not made the Coefficient of x² as 1

The Require steps for the equation by Completing the square method are

Step 1 : Given

Step 2: Divide the whole by 2 we get

Step 3 : Add 10 to both side

Step 4 : Add to both the side.

Step 5 : We have A² + 2AB + B² = (A+B)²

Step 6 : Taking Square root

Step 7 : Subtract both side

Step 8 : Finally we get

Therefore,