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anonymous
 5 years ago
the square of a number is equal to 20 more than the number. find all such numbers
anonymous
 5 years ago
the square of a number is equal to 20 more than the number. find all such numbers

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Owlfred
 5 years ago
Best ResponseYou've already chosen the best response.1Hoot! You just asked your first question! Hang tight while I find people to answer it for you. You can thank people who give you good answers by clicking the 'Good Answer' button on the right!

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Let the number be x then: \(x^2=20+x\), implies that \(x^2x20=0\). This can be factored into \((x5)(x+4)=0\). Hence \(5\) and \(4\) are the only two numbers that satisfy the given conditions.

dumbcow
 5 years ago
Best ResponseYou've already chosen the best response.1n^2 = n+20 quadratic equation set equal to 0 n^2 n 20 = 0 factor (n5)(n+4)=0
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