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Vesna [10]
3 years ago
13

What are the roots of the polynomial equation? x^2 + x -72 =0

Mathematics
1 answer:
Ulleksa [173]3 years ago
3 0
There are many ways you can go. I'm going to start out factoring the whole thing.
(x+9)(x-8) = 0
seperate these into two different equations.
x+9 = 0     and       x-8 = 0
x= -9                      x=8
 Make sure you check it by substituting. Sometimes you might have to reject an answer. In this case you don't. Therefore, 8 and -9 are your roots!

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