How do you solve it with quadratic formula?

Given:

To make this easier, let's expand the left side of the equation. is the same as . Let's rewrite it:

Let's use the FOIL method (First, Outer, Inner, Last) to simplify the binomial of on the left. We then get:

Distribute the seven on the left side (which means multiply the seven by everything in the parenthesis) We are left with:

Since we must have the equation set to 0 to use the quadratic formula, subtract 63 from both sides:

Now, we can use the quadratic formula. The quadratic formula is:

and

Let's identify our a, b and c values:

a: 7

b: -70

c: 112

Plug in your values into the equation:

Simplify the value inside the square root (called the discriminant) and the denominator:

Simplify the square root. The square root of 1764 is 42:

Simplify the numerator:

Simplify:

That's just one answer, lets get the other one.

Simplify the numerator:

Simplify:

Your answers would be:

the answer is d. (1.2, -4.7) on edgn

hope this !

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step-by-step explanation: