The difference of the square of a number and 18 is equal to 3 times that number. Find the positive solution.
2 answers:
Answer: x=6 or x=-3
Step-by-step explanation:
x^2-18=3x
x^2-3x-18=0
(x-6)*(x+3)=0
x-6=0 x+3=0
x=6 x=-3
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