SOLUTION: find the whole number such that twice its square is 11 more than 21 times of the original number.

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Question 1011377: find the whole number such that twice its square is 11 more than 21 times of the original number.
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
w, whole number

2w%5E2=11%2B21w

2w%5E2-21w-11=0

%282w%2B1%29%28w-11%29=0