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solve each equation.

1. 2x^2-16x=20

 

help meeee its for finals

 Dec 18, 2014

Best Answer 

 #2
avatar+118587 
+5

If you have any trouble remembering the quadratic formula then you should listen to this a few times.

https://www.youtube.com/watch?v=O8ezDEk3qCg

 Dec 18, 2014
 #1
avatar+33603 
+5

2x2 - 16x = 20

 

Divide each term by 2

x2 - 8x = 10

 

Subtract 10 from both sides

x2 - 8x - 10 = 0

 

This doesn't factorize nicely, so use the quadratic formula to solve it.

$$x=\frac{-(-8)\pm \sqrt{(-8)^2-4\times1\times (-10)}}{2\times1}$$

 

.

 Dec 18, 2014
 #2
avatar+118587 
+5
Best Answer

If you have any trouble remembering the quadratic formula then you should listen to this a few times.

https://www.youtube.com/watch?v=O8ezDEk3qCg

Melody Dec 18, 2014

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