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Mathematics 8 Online
OpenStudy (anonymous):

Use a Special Factoring Formula to factor the expression. 36z^2 − 60z + 25

OpenStudy (zpupster):

Special Factoring Formula --I had to look this up- it was new to me do you understand this expression??

OpenStudy (anonymous):

not really. what does it mean?

OpenStudy (zpupster):

perfect squares, difference of squares or diff of sums of cubes.......

OpenStudy (zpupster):

do you know how to factor??

OpenStudy (anonymous):

yes i do

OpenStudy (zpupster):

ok 25 and 36 are perfect squares so 6z 5)(6z 5) go ahead and try the correct signs

OpenStudy (anonymous):

both would be neagtive, right?

OpenStudy (zpupster):

correct so this being a perfect square can be written like this: (6z-5)^2

OpenStudy (zpupster):

you can use Foil to check the answer.

OpenStudy (anonymous):

and that is all that needs to be done?

OpenStudy (zpupster):

as far as I can gather from your question.

OpenStudy (anonymous):

thanks for the help. i appreciate it

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