Solve x^2-8x-9=0 using completing the square (show the work)

Mathematics

1 answer:

Elden [556K]2 years ago

3 0

Answer: x=9,-1

Step-by-step explanation:

First, we are gonna start out with finding two numbers that multiply to equal -9 and add up to equal -8

Those numbers would be -9 & 1

-9+1=-8

-9x1=-9

Now we have

(x-9)(x+1)

x-9=0 x+1=0

+9 +9 -1 -1

x=9 x=-1

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barxatty [35]

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Step-by-step explanation:

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