SOLUTION: x^2-9x-4=6

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Question 100781: x^2-9x-4=6
Answer by chitra(359) About Me  (Show Source):
You can put this solution on YOUR website!
The given expression is:

+x%5E2+-+9x+-+4+=+6+


This can be written as:


+x%5E2+-+9x+-+4+-+6+=+0+


+x%5E2+-+9x+-+10+=+0+


Factoring the middle term we get:


+x%5E2+-+10x+%2B+x+-+10+=+0+


+x%28x+-+10%29+%2B+1+%28x+-+10%29+=+0+


(x + 1)(x - 10) = 0


==> x + 1 = 0 Or x - 10 = 0

==> x = -1 or x = 10 are the roots of the given polynomial.

thus the solution.