if sum of a number and its square root is 90 find number

1.	if sum of a number and its square root is 90 find number
Answer» Let the positive square root be \'x\'The number is x^2x^2 +x = 90x^2+x-90=0x^2 +10x-9x-90= 0x(x+10)-9(x+10) =0X=9, x=-10x cannot be -10 because square root is positive number.there x = 9The number is 81.\xa0

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