Q: The sum of the number and its square is 72 what is the number?

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62 + 72 = 85

x+x^2=72x^2 +x -72=0 (x+9)(x-8)=0 x=-9 or x=8

The two square numbers are 72 + 62 = 49 + 36 = 85. The smaller number is therefore 6.

The sum of the positive whole-number factors of 30 is 72.

You take the square root of the number. If it is a perfect square, this will be a whole number. If it is not, it isn't a perfect square.

Related questions

no. 72 is not a square number.

62 + 72 = 85

x+x^2=72x^2 +x -72=0 (x+9)(x-8)=0 x=-9 or x=8

sum of 14th square number and 10th square number

There are two solution: -3 and +2.

72 is rectangular.

25 is a square number, and the sum of 9 and 16 is 25. 9 and 16 are also square numbers.

36 is a perfect square number.

122

the answer is 34

5

The square root of 72 is an irrational number. Since 72 is not a perfect square, the decimal is endless. (just like the value of pi)