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Help 2

NotSoSmart  Nov 19, 2018
 #1
avatar+92808 
+1

x^2  + 9x - 15   = 0 

 

Not too much math to do here, NSS

 

The quadratic formula  will  have "-9"  as the first term in the numerator, so we can eliminate A and B 

 

Further, the dscriminant   =  9^2 -  [4*1 * -15]   =  81 - (-60) =   81 + 60   = 141

 

This will be the integer under the radical.....so....

 

"C"  is correct     !!!!

 

 

cool cool cool

CPhill  Nov 20, 2018

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