Thread: Factoring an expression with four terms

what about this?
x^2-y^2-z^2+2yz
thanks

Originally Posted by princess_21

what about this?
x^2-y^2-z^2+2yz
thanks

Originally Posted by mr fantastic

why did it became like this? x^2 + xy - xz - xy - y^2 + yz + + zx + yz - z^2

i have the same answer but different way. how did you come up with that equation?

here's my solution
x^2-(y^2-2yz+z^2)
x^2-(y-z)^2
{x+(y-z)}{x-(y+z)
(x+y-z)(x-y+z)

Originally Posted by princess_21

why did it became like this? x^2 + xy - xz - xy - y^2 + yz + + zx + yz - z^2

i have the same answer but different way. how did you come up with that equation?

here's my solution
x^2-(y^2-2yz+z^2)
x^2-(y-z)^2
{x+(y-z)}{x-(y+z)
(x+y-z)(x-y+z)

Good for you. A much better way. I always do things the hard way.