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first you have to move all numbers to one side:
x^2-15x+56=0

but this is solving each equation by factorin I am solving quadratics. not that.

Or my bad Xd your doing exactly what it is? XD

Because the other one I did It was 5v^2=-30v-40 XD and I gott v=+- jsqaure root of -14

Wouldn't it be like this? |dw:1366267980891:dw| the answer/

The i

It suppose to be a -4 k

not by my work, x should equal 4 and negative 8

Well thank you though. I appreciate it. ^.^ Going to study mre for the test. XD

Well its ok. You still helped me at least understand it ^.^ though.

haha no problem!

(x-7)(x-8)