ZenKarateGirl2014 ZenKarateGirl2014

21-09-2020
Mathematics

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Factoring by grouping 12x^2+11x+2=0

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21-09-2020

Step-by-step explanation:

(12)(2) = 24 Find 2 numbers whose product is 24 and whose sum is 11 (8 and 3 work)

Rewrite 11x as 8x+3x and factor by grouping:

12x2 + 8x + 3x + 2 = 0

4x(3x+2) + 1(3x+2) = 0

(3x+2)(4x+1) = 0

x = -2/3 or x = -1/4

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