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How do you factor 18x2 plus 39x-15? - Answers

divide by 3: 3(6x2 + 13x - 5) Look for factors of 6 which can be multiplied by factors of -5 and added to give 13. Factors of 6: 1 & 6; 2 & 3; Factors of -5: -1 & 5; -5 & 1 the last and first ones give 3 x -5 = -15 and 2 x 1 = 2, total 13 so: 3(3x - 1)(2x + 5) = 3(6x2 - 2x + 15x - 5) = 18x2 + 39x - 15



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How do you factor 18x2 plus 39x-15? - Answers

https://math.answers.com/basic-math/How_do_you_factor_18x2_plus_39x-15

divide by 3: 3(6x2 + 13x - 5) Look for factors of 6 which can be multiplied by factors of -5 and added to give 13. Factors of 6: 1 & 6; 2 & 3; Factors of -5: -1 & 5; -5 & 1 the last and first ones give 3 x -5 = -15 and 2 x 1 = 2, total 13 so: 3(3x - 1)(2x + 5) = 3(6x2 - 2x + 15x - 5) = 18x2 + 39x - 15



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https://math.answers.com/basic-math/How_do_you_factor_18x2_plus_39x-15

How do you factor 18x2 plus 39x-15? - Answers

divide by 3: 3(6x2 + 13x - 5) Look for factors of 6 which can be multiplied by factors of -5 and added to give 13. Factors of 6: 1 & 6; 2 & 3; Factors of -5: -1 & 5; -5 & 1 the last and first ones give 3 x -5 = -15 and 2 x 1 = 2, total 13 so: 3(3x - 1)(2x + 5) = 3(6x2 - 2x + 15x - 5) = 18x2 + 39x - 15

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      divide by 3: 3(6x2 + 13x - 5) Look for factors of 6 which can be multiplied by factors of -5 and added to give 13. Factors of 6: 1 & 6; 2 & 3; Factors of -5: -1 & 5; -5 & 1 the last and first ones give 3 x -5 = -15 and 2 x 1 = 2, total 13 so: 3(3x - 1)(2x + 5) = 3(6x2 - 2x + 15x - 5) = 18x2 + 39x - 15

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