Solve the quadratic by factoring 2X²-2X-12=0

asked May 3, 2015 94.1k views

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4 votes

$2x^2-2x-12=0\\ 2(x^2-x-6)=0\\ 2(x^2-3x+2x-6)=0\\ 2(x(x-3)+2(x-3))=0\\ 2(x+2)(x-3)=0\\ x=-2 \vee x=3$

Jsbeckr answered May 4, 2015

8.1k points

4 votes

$2x^2-2x-12=0\\\\2x^2+4x-6x-12=0\\\\2x(x+2)-6(x+2)=0\\\\(x+2)(2x-6)=0\iff x+2=0\ \vee\ 2x-6=0\\\\x=-2\ \vee\ x=3$

Chris Woolum answered May 10, 2015

7.9k points

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