Factor each trinomial. See Examples 1 through 4. x2 + 9x + 18
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Textbook Solutions for Intermediate Algebra
Question
Recall that a graphing calculator may be used to check addition,subtraction, and multiplication of polynomials. In the same manner, a graphing calculator may be used to check factoring ofpolynomials in one variable. For example, to see that2x3 - 9x2 - 5x = x12x + 121x - 52graph Y1 = 2x3 - 9x2 - 5x and Y2 = x12x + 121x - 52. Thentrace along both graphs to see that they coincide. Factor the followingand use this method to check your results.x4 + 6x3 + 5x2
Solution
The first step in solving 5.6 problem number 109 trying to solve the problem we have to refer to the textbook question: Recall that a graphing calculator may be used to check addition,subtraction, and multiplication of polynomials. In the same manner, a graphing calculator may be used to check factoring ofpolynomials in one variable. For example, to see that2x3 - 9x2 - 5x = x12x + 121x - 52graph Y1 = 2x3 - 9x2 - 5x and Y2 = x12x + 121x - 52. Thentrace along both graphs to see that they coincide. Factor the followingand use this method to check your results.x4 + 6x3 + 5x2
From the textbook chapter Factoring Trinomials you will find a few key concepts needed to solve this.
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