Solve
Step
x2 – 4x + 4 = 4 + x
x2 – 5x = 0
Subtract x. Subtract 4
Check 
If x
= 0, then
If x
= 5, then
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Solve for x: |
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Solve |
Step |
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Subtract 2 from both sides. |
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Square both sides to undo the square root. |
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x2 – 4x + 4 = 4 + x |
Remember to use FOIL |
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x2 – 5x = 0 |
Set equal to 0. Subtract x. Subtract 4 |
| x(x – 5) = 0 | It Factors!! |
| x = 0 or x = 5 | Check both answers. |
| x = 0 works!! | Done! |
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Check |
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If x
= 0, then If x
= 5, then |
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