The square of a positive number decreased by 4 times the number is 12. Find the positive number. [Only an algebraic solution will be accepted.]

Question

Mathematics

Jasmine Gamble

1 January, 15:50

The square of a positive number decreased by 4 times the number is 12. Find the positive number. [Only an algebraic solution will be accepted.]

+2

Answers (1)

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Wallace · Answer 1

The math translation is: x^2-4x=12

So then you can subtract 12 from both sides and solve as a quadratic equation.

X^2-4x-12=0

This factors into:

(X-6) (x+2) = 0.

So then the answer would be 6 or - 2.