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- The difference between a number and its square is 72. What is the number?
Question 1:
The difference between a number and its square is 72.What is the number?
A. 19
B. 18
C. 30
D. 9
Feedback x2 – x = 72. Solve for x using the quadratic formula and x = 9 and –8. Only 9 satisfies the restrictions.
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