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Factorising quadratic? Watch

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    Im working through quadratic sequences but the second part of a question confuses me.

    a)The first part of the question asks you to factorise the expression 5x^​2-19x+18 =
    (5x-9)(x-2)

    ________________________________ ____________________________
    b)The second part asks to use you answer from a to factorise the expression
    5(x-1)^2-19(x-1)+18

    How do I apply my answer from part a to this question?



    Thankyou
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    (Original post by wfisom)
    Im working through quadratic sequences but the second part of a question confuses me.

    a)The first part of the question asks you to factorise the expression 5x^​2-19x+18 =
    (5x-9)(x-2)

    ________________________________ ____________________________
    b)The second part asks to use you answer from a to factorise the expression
    5(x-1)^2-19(x-1)+18

    How do I apply my answer from part a to this question?



    Thankyou
    The new expression is identical except (x-1) has been substituted in place of x.

    So take your factorised solution and do the same: substitute (x-1) in place of x and simplify each bracket.
 
 
 
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