Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$- { x }^{ 2 } +9x=0$$

Answer

x=0,9

Solution


Regroup terms.
\[9x-{x}^{2}=0\]
Factor out the common term \(x\).
\[x(9-x)=0\]
Solve for \(x\).
\[x=0,9\]
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