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Solve x^2 - 5x - 12 = 0.

 Jun 2, 2020
 #1
avatar+52 
+1

You mean as in solving for x, right?

 Jun 2, 2020
 #2
avatar+52 
+2

Let's solve your equation step-by-step.

x^2−5x−12=0

For this equation: a=1, b=-5, c=-12

1x^2+(−5x)+(−12)=0

Step 1: Use quadratic formula with a=1, b=-5, c=-12.

x=−b±√b^2−4ac / 2a

x= −(−5)±√(−5)2−4(1)(−12) / 2(1)

x= 5±√73 / 2

 

so, 

 

x=5/2+ 1/2 √73 

or

 x= 5/2 + (−1)/2 √73

 

the / symbol means that it is a fraction.

 

smiley

 Jun 2, 2020

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