Question

How can x2 = x2 + 2x + 9 be set up as a system of equations?

Answer 1

x2 = x2 + 2x + 9   Now subtract x2 from both sides and you have

x2- x2 = x2 - x2 + 2x + 9  or  0 = 2x + 9  now subtract 9 from both sides so you can solve for x.

0 -9 = 2x -9...and you have -9 = 2x 

Now solve for x  by dividing both sides by 2 and you arrive at x = -4.5

Answer 2

Answer:

x = - 4.5

Step-by-step explanation:

The given expression is x² = x² + 2x + 9

we have solve the equation.

In this equation we will transfer like terms in one side of the equation.

x² - x² = 2x + 9

2x + 9 = 0

Now we subtract 9 from each side of the equation.

2x + 9 - 9 = 0 - 9

2x = -9

Now we will divide by 2 on each side of the equation.

2x/2 = -9/2

x = -4.5