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The sum of a number and its square is 90. Find the number.
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4 votes
The sum of a number and its square is 90. Find the number.

User Dharam Mali
by
5.1k points

1 Answer

3 votes

Answer: 9

Step-by-step explanation

Step-by-step explanation:

Let n be the integer in question. Then we have

We now have a quadratic equation to solve. We could use the quadratic formula, however we know that

n

is an integer, so instead let's try to solve by factoring instead.

User TwilightSun
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