Please solve by factoring 5x^2+7x-66=0...use a comma to seperate answers.

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23-04-2014
Mathematics

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Please solve by factoring 5x^2+7x-66=0...use a comma to seperate answers.

Sagot :

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Lilith Lilith · Answer 1 · 2014-04-23T05:59:32-04:00

Lilith Lilith

23-04-2014

[tex]5x^2+7x-66=0 \\ \\5x^2+7x -22x+ 22x-66=0 \\ \\ 5x^2-15x+ 22x-66=0 \\ \\5x(x-3)+22(x-3)=0 \\ \\ (x-3)(5x+22)=0\\ \\x-3 = 0 \ \ or \ \ 5x+22 =0 \\ \\ x=3 \ \ or \ \ 5x=-22 \ \ /:5 \\ \\x=3 \ \ or \ \ x=-\frac{22}{5} \\ \\x=3 \ \ or \ \ x=-4\frac{2}{5} [/tex]

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Please solve by factoring 5x^2+7x-66=0...use a comma to seperate answers.

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