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Question 605419: please help: quadratic equations; the square of a number is the same as twice the number?
Answer by jim_thompson5910(35256)   (Show Source):
You can put this solution on YOUR website! "the square of a number is the same as twice the number" means that
x^2 = 2x
Now solve for x
x^2 = 2x
x^2 - 2x = 0
x(x-2) = 0
x = 0 or x-2 = 0
x = 0 or x = 2
So the solutions are x = 0 or x = 2
This means that the square of 0 (or 0^2 = 0) is the same as twice zero (2*0 = 0)
and that
the square of 2 (2^2 = 4) is the same as twice the number 2 (2*2 = 4)
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Jim
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