3 years ago

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

2 answers:

kap26 [50]3 years ago

8 0

$2 x^{2} -9x+10=2 x^{2} -4x-5x+10=2x(x-2)-5(x-2)= \\ =(x-2)(2x-5).$

4 0

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

Thus it is $2(x-\frac{5}2)(x-2)$

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