14-06-2015
Mathematics

contestada

Factorise 2x²-9x+10 (this must be put in two brackets)

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albastruverde12 albastruverde12

14-06-2015

[tex]2 x^{2} -9x+10=2 x^{2} -4x-5x+10=2x(x-2)-5(x-2)= \\ =(x-2)(2x-5).[/tex]

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Hippalectryon Hippalectryon

18-06-2015

Find both roots :
[tex]\Delta=81-80=1[/tex] hence [tex]r=\frac{9\pm1}4=\frac{5}2\text{ or }2[/tex]

Thus it is [tex]2(x-\frac{5}2)(x-2)[/tex]

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