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October 21, 2014

October 21, 2014

Posted by **Rae Rae** on Sunday, April 5, 2009 at 2:50pm.

Directions: Determine whether each trinomial is a perfect square trinomial. If so factor it.

1. x^2-16x+64

- Algebra (Does any one understand special factors)? -
**Chopstick**, Sunday, April 5, 2009 at 3:22pmI think its a perfect square trionomial because you can square 4^2 to get 16 and 8^2 to get 64

(x - 8)(x - 8 )

- Algebra (Does any one understand special factors)? -
**Reiny**, Sunday, April 5, 2009 at 3:54pmfirst condition:

the first and last terms must be perfect squares, and they must both be positive

second condition:

the square root of the first term times the square root of the last term, then doubled, should be equal to the middle term.

e.g.

25x^2 + 60xy + 36y^2

square root of first: 5x

square root of last : 6y

product: 30xy

doubled: 60xy , so YES

e.g.

x^4 - 10x^2 + 25

square root of first: x^2

square root of last: 5

product : 5x^2

doubled : 10x^2, YES!

does that make sense?

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