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Earn +20 ptsQ: What is the LCF for 45 and 15?
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How do you factor 5x2 - 45?
To factor any term, divide by the LCF (largest common factor) of the term. For 5x2-45, the LCF is 5. 5x2-45 = 5(x2-9) It can, of course, be factored even further to become: 5(x2-9) = 45(x2/9 - 1) but when factoring, we usually don't need to go past 5(x2-9) (for example, you've figured out that x2 = 9, thus x = +/- 3.)
GCF of 15 and 45?
It's 15. 15 can divide evenly into 45.
What 3x what equals 45?
If: 3x = 45 Then: x = 15
Write 6 out of 45 in simplest form?
6/45 =2/15 because 3 goes into 6 two times and into 45 15 times.
Is 8 over 15 greater than 20 over 45?
Yes, because 8/15 = 24/45
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