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Popular Word Problems >

If 2 is added to the square of a number, the result is 18. Find all such numbers.

Solution

I f 2 i s a dd e d t o t h e s q u a re o f a n u mb er, t h e res u lt i s 18. F in d a ll s u c h n u mb ers .

Solution

The number : 4 or - 4

Solution steps

Represent the number with

x

A.T.Q.:

x^{2} + 2 = 18

Solve for

x, x^{2} + 2 = 18 : x = 4, x = - 4

The number : 4 or - 4

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