What is m squared-2m-65 equals -2 using the quadratic equation?

Answer 1

m = 9

This is because, if:

m squared - 2m - 65 = 2

Then:

m squared - 2m = 65 + -2

m squared - 2m = 63

So:

63 = m squared - 2m

m squared - 2m = m x m - 2m

This means:

63 = m (m - 2)

So something times itself minus two is 63.

Going through different numbers, it is clear that 9 and 7 work.

So:

m x (m - 2) = 9 x (9-2) = 9 x (7) = 9 x 7 = 63

M is therefore 9.