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    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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    (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
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    (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


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


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    You could complete the square
 
 
 
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