The square of a number is equal to 10 less than 7 times that number. What are the two possible solutions? Which of the following equations is used in the process of solving this problem?

1.) x^2 - 7x + 70 = 0

2.) x^2 - 7x + 10 = 0

3.) x^2 + 7x - 10 = 0

Question

The square of a number is equal to 10 less than 7 times that number. What are the two possible solutions? Which of the following equations is used in the process of solving this problem? 

1.) x^2 - 7x + 70 = 0

2.) x^2 - 7x + 10 = 0

3.) x^2 + 7x - 10 = 0

anonymous · Answer

i would say 2 but something is odd about it.

campbell_st · Answer

using the given information 

let x be the number 

squaring it and you get 

x^2 

its equal to 10 less that 7 times the number

x^2 = 7x - 10

now rewrite the equation with all terms on the left