# Please help with solving for zero

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• Feb 12th 2009, 04:24 PM
runner940
Please help with solving for zero
equation: (w+5)(6w^2-18)=0

I know one zero equals -5, can you help me find the other?(Speechless)(Cool)
• Feb 12th 2009, 04:46 PM
mr fantastic
Quote:

Originally Posted by runner940
equation: (w+5)(6w^2-18)=0

I know one zero equals -5, can you help me find the other?(Speechless)(Cool)

$(w + 5) \cdot 6(w^2 - 3) = 0 \Rightarrow 6 (w + 5)(w - \sqrt{3})(w + \sqrt{3}) = 0 \, ....$