Write the Word or Phrase That Best Completes Each Statement

Essay

Write the word or phrase that best completes each statement or answers the question.

Provide an appropriate response.
-Tina was asked to solve the following problem: "The product of two consecutive numbers is 90. Find the numbers." Tina's solution is given below. Do you agree with her conclusion? If not, why not?
x(x + 1) = 90
+ x = 90
+ x - 90 = 0
(x + 10)(x - 9) = 0
x = -10 or x = 9
The pair of numbers is 9 and 10