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What is the solution of x^2+x-6/x-7<0 PLEASE HELP ME :( (it’s not the 2nd one i already tried it)

What is the solution of x^2+x-6/x-7<0 PLEASE HELP ME :( (it’s not the 2nd one i-example-1

2 Answers

2 votes

Answer:

The answer would be A

Hope this helps!!!

Explanation:

User Thili
by
4.3k points
5 votes

Answer:

the first one
\:x\le \:-3\quad \mathrm{or}\quad \:2\le \:x<7

Explanation:

Factor
x^2+x-6 :

Break the expression into groups


\left(x^2-2x\right)+\left(3x-6\right)


\mathrm{Factor\:out\:}x\mathrm{\:from\:}x^2-2x\mathrm{:\quad}


x\left(x-2\right)


\mathrm{Factor\:out\:}3\mathrm{\:from\:}3x-6\mathrm{:\quad}


3\left(x-2\right)


x\left(x-2\right)+3\left(x-2\right)


\mathrm{Factor\:out\:common\:term\:}x-2


\left(x-2\right)\left(x+3\right)


(\left(x-2\right)\left(x+3\right))/(x-7)\\


(\left(x-2\right)\left(x+3\right))/(x-7)\le \:0


\mathrm{Find\:the\:signs\:of\:the\:factors\:of\:}(\left(x-2\right)\left(x+3\right))/(x-7)


\mathrm{Identify\:the\:intervals\:that\:satisfy\:the\:required\:condition:}\:\le \:\:0


x<-3\quad \mathrm{or}\quad \:x=-3\quad \mathrm{or}\quad \:x=2\quad \mathrm{or}\quad \:2<x<7

Merge Overlapping Intervals


x\le \:-3\quad \mathrm{or}\quad \:2\le \:x<7

User Dmitriy Zapevalov
by
4.1k points