Question

Solve using the Quadratic Formula.
x² - 6x - 7 = 0

Answer 1

\[x=\frac{-b \pm \sqrt{b^2 - 4ac}}{2a} \rightarrow x=\frac{6 \pm \sqrt{36+28}}{2} \rightarrow x = \frac{6 \pm \sqrt{64}}{2}\]
so you get
(6+8)/2 = 7 and (6-8)/2 = -1
so x = 7 and x = -1

Answer 2

a = 1
b= -6
c = -7

Use: \(D = b^2 - 4ac\)

D = 36 + 28 = 64

\[\sqrt{D} = 8\]

Now use:
\[x = \frac{6 \pm 8}{2}\]

x = 7 and x = -1

Answer 3

Hey, Jeletta. I can help you. Do you have any specific questions about how to do this? The basic steps are:
1) Write the equation set equal to 0. (If it's not already)
2) Figure out what A, B, and C are.
3) Plug into the formula and simplify it.