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Five less than a number squared is 30 more than twice the number. Find the number.

Solution

Five less than a number squared is 30 more than twice the number. Find the number.

Solution

The number : 7 or - 5

Solution steps

Represent the number with

x

A.T.Q.:

x^{2} - 5 = 30 + 2 x

Solve for

x, x^{2} - 5 = 30 + 2 x : x = 7, x = - 5

The number : 7 or - 5

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