SOLUTION: directions: find the roots of the quadratic equation y=x^2+7x-18 by factoring. choose the correct answer. A)7,9 B)9,2 C)-7,-9 D)-9,2. which one is the answer?

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: directions: find the roots of the quadratic equation y=x^2+7x-18 by factoring. choose the correct answer. A)7,9 B)9,2 C)-7,-9 D)-9,2. which one is the answer?      Log On


   



Question 123886: directions: find the roots of the quadratic equation y=x^2+7x-18 by factoring. choose the correct answer. A)7,9 B)9,2 C)-7,-9 D)-9,2. which one is the answer?
Answer by chitra(359) About Me  (Show Source):
You can put this solution on YOUR website!
The given expression is:

y = x%5E2+%2B+7x+-+18+

By the method of factoring:

x%5E2+%2B+9x+-+2x+-+18

x(x + 9) - 2(x + 9)

==> (x + 9)(x - 2)

Thus the solution.

Hence the solution set is: (-9,2)

That is option (d) is the right answer.

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