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4x^2+8x-60=0

 Feb 4, 2020

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 #1
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\({-b \pm \sqrt{b^2-4ac} \over 2a} \to \frac{-8\pm \sqrt{8^2-4\cdot \:4\left(-60\right)}}{2\cdot \:4} \to\frac{-8\pm\sqrt{8^2+4\cdot \:4\cdot \:60}}{2\cdot \:4} \to\frac{-8\pm\sqrt{1024}}{2\cdot \:4}\to\frac{-8\pm\sqrt{1024}}{8}\to \frac{-8\pm32}{8}\to\frac{-40}{8}, \frac{24}{8}. \)Thus, the roots are \(\boxed{-5}, \boxed{3}.\) laugh

 Feb 4, 2020
 #1
avatar+179 
+1
Best Answer

\({-b \pm \sqrt{b^2-4ac} \over 2a} \to \frac{-8\pm \sqrt{8^2-4\cdot \:4\left(-60\right)}}{2\cdot \:4} \to\frac{-8\pm\sqrt{8^2+4\cdot \:4\cdot \:60}}{2\cdot \:4} \to\frac{-8\pm\sqrt{1024}}{2\cdot \:4}\to\frac{-8\pm\sqrt{1024}}{8}\to \frac{-8\pm32}{8}\to\frac{-40}{8}, \frac{24}{8}. \)Thus, the roots are \(\boxed{-5}, \boxed{3}.\) laugh

DragonLord Feb 4, 2020
 #2
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Thanks

 Feb 4, 2020
 #3
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You're welcome :D

 Feb 5, 2020

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