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How do you solve x2 - 9x?

Updated: 4/28/2022
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Wiki User

11y ago

Best Answer

-7

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Kamron Roberts

Lvl 10
3y ago
This answer is:
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Wiki User

11y ago

Not being an equation, this doesn't really have a solution. If you want to factor it, each term has a common factor of "x", so you could rewrite it as:

x(x - 9)

If you are given a value for this equation (we'll call it "y"), then you can solve it like this:

x2 - 9x = y
x2 - 9x + 81/4 = y + 81/4
(x - 9/2)2 = y + 81/4
x - 9/2 = ± √(y + 9/2)
x = 9/2 ± √(y + 9/2)


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Q: How do you solve x2 - 9x?
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