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This quadratic equation which will have two solutions can be solved by completing the square or by using the quadratic equation formula.

Completing the square:

x2+18x+4 = 0

(x+9)2+4 = 0

(x+9)2+4-81 = 0

(x+9)2 = 77

x+9 = + or - the square root of 77

x = -9 + or - the square root of 77

If you're not too sure about the procedure of completing the square your maths tutor should be familiar with it.

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Q: Solve x2 plus 18x plus 4 equals 0?
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