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# c1 help

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1. I need to factorise 3x^2-13x into brackets like a normal quadratic but i dont know how to because there is no C
Its for plotting graphs so i need it to find the 2 points

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2. (Original post by ksj.11)
I need to factorise 3x^2-13x into brackets like a normal quadratic but i dont know how to because there is no C
Its for plotting graphs so i need it to find the 2 points

Posted from TSR Mobile
x(3x-13)=0
x=0 x=13/3
3. (Original post by ksj.11)
I need to factorise 3x^2-13x into brackets like a normal quadratic but i dont know how to because there is no C
Its for plotting graphs so i need it to find the 2 points

Posted from TSR Mobile
You can choose c = 0 if necessary. But for the method given above you'll see that it's a bit easier than when there's c, you just need to know how you need to use it.
4. (Original post by imran_)
x(3x-13)=0
x=0 x=13/3
i tried that but the answers in the back are different

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5. (Original post by ksj.11)
i tried that but the answers in the back are different

Posted from TSR Mobile
You could complete the square

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Updated: September 17, 2016
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