Question

A student is solving the quadratic equation below by completing the square. Which of the following equations shows an accurate step in the process?x^2 + 14x + 15 = 0answer choices include:(x + 7 )^2 = 34( x + 14 )^2 = 64( x + 7 )^2 = 64( x + 14 )^2 = 34

Answer 1

So,

Here we have the following quadratic equation:

We're going to solve it by completing the square.

What we do, is to get a binomial of the form:

Adding and substracting a number to the equation.

In this case, you can notice that:

Rewriting:

Therefore, the equation (x + 7 )^2 = 34 shows an accurate step in the process.