FACTORING BY GROUPING HELP PLEASE!!

[PreAlgebraDummy15]

5x⁴ -80

5(1x³-16) 5(1x³+16)


Is that the right answer? I factored 5 & 80 by 5 (5 goes into 5 once and 5 goes into 80 16 times. ) Thanks!

 

[Denis]

5x⁴ -80

5(1x³-16) 5(1x³+16)


Is that the right answer? I factored 5 & 80 by 5 (5 goes into 5 once and 5 goes into 80 16 times. ) Thanks!

NO! See my answer to your other SAME post.

That answer you show indicates that you're NOT ready for this
kind of factoring: you need to go back to basics :!:

 

[tkhunny]

5x⁴ -80

5(1x³-16) 5(1x³+16)


Is that the right answer? I factored 5 & 80 by 5 (5 goes into 5 once and 5 goes into 80 16 times. ) Thanks!

What? Too much going on. It's simpler than you are making it.

5x⁴ - 80 =
Factoring out the 5 using the Distributive Property of Multiplication over Addition
5*(x⁴ - 16) =
Difference of Squares
5*(x² - 4)*(x² + 4) =
Difference of Squares
5*(x + 2)*(x - 2)*(x² + 4)

One piece at a time.

Learn the Distributive Property of Multiplication over Addition. This will prevent you from inventing new '5's.

Memorize the form "Difference of Squares". You will see this often.