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The sum of a number and its square is 90. Find the number.
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Feb 27, 2021
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The sum of a number and its square is 90. Find the number.
Mathematics
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Dharam Mali
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Dharam Mali
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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.
TwilightSun
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Mar 5, 2021
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TwilightSun
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