How do you solve $2x^2 - 9x + 7 = 0$ ?

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Answer 1 · 2016-08-06T15:09:29

This equation has solutions $x=7/2$ and $x=1$

Notice that $9 = 2+7$ .

So we find:

$0 = 2x^2-9x+7$

$= 2x^2-2x-7x+7$

$= 2x(x-1)-7(x-1)$

$= (2x-7)(x-1)$

Hence zeros: $x=7/2$ and $x=1$

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