How do you write $y= -7x^2+14$ in factored form?

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Answer 1 · 2015-09-20T14:14:32

$y=-7(x+sqrt2)(x-sqrt2)$

First, you can factor out -7.
$y=-7x^2+14$
$y=-7(x^2-2)$

You will notice that $(x^2-2)$ is a special product (difference of two squares).
$y=-7(x^2-2)$
$y=-7(x+sqrt2)(x-sqrt2)$

After that, you won't be able to factor it any further. :)

How do you write y= -7x^2+14y= -7x^2+14 in factored form?