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Rory Mcconnell
Mathematics
6 June, 04:52
Solve 3x^2-27=0 using square roots
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Hadley Obrien
6 June, 04:59
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3x^2-27=0
3x^2 = 27
x^2 = 9
x^2 = + - 3
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Camden Hurst
6 June, 05:02
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3x^2-27=0
3 (x^2-9) = 0 notice the difference of squares in the parentheses ...
3 (x+3) (x-3) = 0
so x=±3 which means x=-3 or 3
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