(m + 5)(m - 1) = 7
m2 + 4m - 5 = 7
m2 + 4m - 12 = 0
(m + 6)(m - 2)
m = -6, 2.
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around the 8 and the 5
The parentheses would be placed thus: 27 - (49 / 7 + 12) = 8
You would have to take the cube root of 400000, which equals 73.68
75
You would take 2 and replace it for x in your other equation and solve.