Question

Write an equation for each problem. The square of a number is 8 more than twice the number.

Answer 1

The equation is equal to

`x^(2)=2x+8`

Explanation:

Let

x -----> the number

we know that

The equation that represented the problem is equal to

`x^(2)=2x+8`

`x^(2)-2x-8=0`

Solve the quadratic equation by graphing

The solution are x=-2 and x=4

see the attached figure

therefore

The number can be -2 or 4