book Maths Puzzle Numerical Ability

I need to solve by factoring: m^2-2m-63=0

Thanks for your help.

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book Other Question

The directions say to use the quadratic formula to find the roots of the following polynomials:
a) 6x^2-6-5x
b) 6x^2-6x-5
but no matter how i solve it all my soloutions are inc please help me! how do you find the exact equation of an euler line of a acute
triangle?