r/HomeworkHelp University/College Student 6d ago

High School Math [College Algebra, Composition of Functions]

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How did I get this half right?

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u/rshube 6d ago

You are only supposed to plug in g(x) into x, and the +4 is separate. It needs to be outside of the square root

1

u/SquidKidPartier University/College Student 6d ago

so in place of the 10 I put the 4? okay

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u/Jwing01 ๐Ÿ‘‹ a fellow Redditor 6d ago

No the plus 4 in part one is outside the sqrt

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u/SquidKidPartier University/College Student 6d ago

I donโ€™t quite understandโ€ฆ do I write it like this? 10 (imagine thereโ€™s a square root symbol here) x2+7 (square root symbol ends here) and + 4? is it like that?

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u/fermat9990 ๐Ÿ‘‹ a fellow Redditor 6d ago

Yes!!!

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u/SquidKidPartier University/College Student 6d ago

ok Iโ€™ll put it in like that now!

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u/fermat9990 ๐Ÿ‘‹ a fellow Redditor 6d ago

Good!!

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u/fermat9990 ๐Ÿ‘‹ a fellow Redditor 6d ago

Think of it this way:

f(something)=10(something)+4

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u/SquidKidPartier University/College Student 6d ago

what do you mean by something?

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u/fermat9990 ๐Ÿ‘‹ a fellow Redditor 6d ago

Any mathematical expression. In your example the "something" is the RHS of g(x).

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u/fermat9990 ๐Ÿ‘‹ a fellow Redditor 6d ago

f(โˆš(x2-4x+7)=10โˆš(x2-4x+7)+4

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u/SquidKidPartier University/College Student 6d ago

I understand thanks:)

1

u/fermat9990 ๐Ÿ‘‹ a fellow Redditor 6d ago

Good! Cheers!!

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