SOLUTION: The square of a number is 20 more than 8 times the number. Find the number.

Question 275033: The square of a number is 20 more than 8 times the number. Find the number.
Answer by unlockmath(1688) (Show Source): You can put this solution on YOUR website!
Hello,
Let's have x represent the number. Therefore the equation will be:
x^2=8x+20 Subtract 8x and 20 from both sides to get:
x^2-8x-20=0 This can be factored into:
(x-10)(x+2)=0 Solve for x:
x=10
x=-2
Check it out to see if the answers work.
Also check out a new book I wrote:
www.math-unlock.com

RELATED QUESTIONS
sixteen more than the square of a number is 8 times the number. find the... (answered by Paul)

8 more than the square number is 9 times the number. find the... (answered by ankor@dixie-net.com)

Four times the square of a number is 45 more than 8 times the number. What is the... (answered by nyc_function)

15 more than the square of a number is 8 times the... (answered by solver91311)

The square of a negative number is 35 more than 2 times the negative number. Find the... (answered by ankor@dixie-net.com)

Ten more than the square of a number of a number is seven times the number. Find ALL... (answered by Fombitz)

12 times the square of a positive number is five more than four times the same number.... (answered by Fombitz)

five less than the square of a positive number is 3 more than 2 times the number. find... (answered by mananth)

Five less than the square of a positive number is 1 more than 5 times the number. Find... (answered by lwsshak3)