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Mathematics 9 Online
OpenStudy (anonymous):

Multiply. (3x – 5)2 9x2 – 30x + 25 6x2 – 10 9x2 – 25 9x2 – 15x + 25

OpenStudy (anonymous):

is it supposed to be multiplied by two or squared?

OpenStudy (anonymous):

Squared... sorry

OpenStudy (anonymous):

\[(3x - 5)^2 = 9x^2 - 25\] If I'm not mistaken.

OpenStudy (anonymous):

x^2-25 is what i got..

OpenStudy (anonymous):

\[(3x - 5)^2 = 9x^2 + 25\] If I'm not mistaken.

OpenStudy (anonymous):

9*

OpenStudy (anonymous):

Yes 9x^2 + 25 because ur multiplying 2 negatives

OpenStudy (anonymous):

When you square a number, its always going to be positive. -5 * -5 = 25

OpenStudy (anonymous):

right (:

OpenStudy (anonymous):

Sooo.. the answer is?

OpenStudy (anonymous):

I FOILed it and got 9x^2 - 30x + 25?

OpenStudy (anonymous):

Yes... Whats foil?

OpenStudy (anonymous):

Factor... OIL?

OpenStudy (anonymous):

^I completely forgot about Foil! First Inner, Outer Last

OpenStudy (anonymous):

Oh

OpenStudy (anonymous):

*First outer, inner last

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