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What is m squared-2m-65 equals -2 using the quadratic equation?
Wiki User
∙ 12y ago
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.
wthu
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