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Mathematics 11 Online
OpenStudy (anonymous):

@Isaiah.Feynman @AonZ

OpenStudy (anonymous):

OpenStudy (isaiah.feynman):

Try this one if you have any questions lemme know.

OpenStudy (aonz):

so just sub -5 in and what do you get?

OpenStudy (anonymous):

\[f(x) = x^3+4x^2-10x+19\]

OpenStudy (anonymous):

is that the answer

OpenStudy (anonymous):

No, I was just re-writing the question. You need to plug -5 in for x and calculate the answer.

OpenStudy (anonymous):

can u explain

OpenStudy (anonymous):

Does this help? \[f(-5) = (-5)^3+4(-5)^2-10(-5)+19\]

OpenStudy (anonymous):

Evaluate one term at a time, then add and subtract.

OpenStudy (anonymous):

ok

OpenStudy (anonymous):

I have the answer if you want to check it when you are ready.

OpenStudy (anonymous):

no dont tell me

OpenStudy (anonymous):

I'm not going to. If you post your answer, I'll tell you if I agree.

OpenStudy (anonymous):

44?

OpenStudy (anonymous):

That's not my answer. Let me recheck my arithmetic just to make sure...

OpenStudy (isaiah.feynman):

@divagirl421 that's whats up

OpenStudy (anonymous):

am i right

OpenStudy (anonymous):

No, I don't think so. Let's go through it one step at a time: \((-5)^3\) = ?

OpenStudy (anonymous):

-125

OpenStudy (anonymous):

Good. \(4(-5^2)\) = ?

OpenStudy (anonymous):

\(4(-5)^2\)

OpenStudy (anonymous):

100

OpenStudy (anonymous):

You always learn best by teaching and this is a prime example. You are correct with your answer of 44. I forgot that anything squared is positive. My sincere apologies.

OpenStudy (anonymous):

its ok but thank you

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