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If xsquared + 4x = 32 then x = _____ and _____.

Guest Apr 20, 2017
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x^2  + 4x   =  32      subtract 32 from both sides

 

x^2 + 4x - 32   = 0       factor

 

(x + 8) ( x - 4)  =  0

 

Setting both factors to 0

 

x + 8   = 0                                                x  -   4   = 0

 

subtract 8 from both sides                    add 4 to both sides

 

x  =  - 8                                                       x  = 4

 

 

 

cool cool cool

CPhill  Apr 20, 2017

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