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Mathematics 9 Online
OpenStudy (anonymous):

I WILL FAN AND MEDAL!

OpenStudy (anonymous):

Find the product of (x − 5)2. x2 + 10x + 25 x2 − 10x + 25 x2 − 25 x2 + 25

OpenStudy (anonymous):

\[(x − 5)^2\] \[(x − 5)(x − 5)\]

OpenStudy (anonymous):

FOIL

OpenStudy (anonymous):

What is foil?

OpenStudy (anonymous):

\[(x-a)^2 = x^2 - 2ax + a^2\]

OpenStudy (anonymous):

Where are the a's coming from? :(

OpenStudy (anonymous):

So based on that, ^ , which ones can you eliminate from the answer choices?

OpenStudy (anonymous):

c and d

OpenStudy (anonymous):

Good. Eliminate: C & D

OpenStudy (anonymous):

So do you think its A or B?

OpenStudy (anonymous):

I thinks its b

OpenStudy (anonymous):

\[ (x − 5)^2 \] \[ (x − 5) (x − 5)\] x * x = x^2 x * -5 = -5x -5 * x = -5x -5 * -5 = +25 \[ (x − 5)^2 = (x − 5) (x − 5) = x^2 - 10x + 25\]

OpenStudy (anonymous):

Oooh That makes a lot more sense thanks for explaining it to me!

OpenStudy (anonymous):

Yup B \[ (x − 5)^2 \] \[(x − 5) (x − 5) \] \[ x^2 - 10x + 25\]

OpenStudy (anonymous):

yw

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