SOLUTION: can someone please show me how to solve this by using the quadratic formula and then prove my answer is correct, what is the quadratic formula.
X^2-9=0
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Question 797112: can someone please show me how to solve this by using the quadratic formula and then prove my answer is correct, what is the quadratic formula.
X^2-9=0
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
The quadratic formula applies to a parabola
which has the form:
The formula is:
--------------
You can make your equation into this form:
Now plug these values into the formula
and, taking the negative square root,
The solutions are ,
check:
and
OK
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