Factor Completely: 8x^4 - 20x^3 - 12x^2
what is the highest number that goes into 8,20,and 12 ??
4 i think
yes...and what goes into x^4, x^3, and x^2 ?
let me rephrase that...what can be taken out of x^4, x^3 and x^2 ?
no.....which is the smallest x ?
so we can factor out 4x^2
okay, how do you do that? I don't remember
4x^2(2x^2 - 5x - 3) and if you multiply the 4x^2 through the parenthesis, you end up with the original problem : 8x^4 - 20x^3 - 12x^2)
Oh okay i remember learning that! But i can't remember what to do next? is that the answer?
no...it can be factored further... 4x^2(x - 3)(2x + 1)
wow, i didn't know that, i forgot that step
well...sometimes it can be factored more and sometimes it can't. This time it could.
oh okay, is that the final answer?
yes it is :)
Thank you soooo Much!! i have other questions i am going to post after i close this one that are identical that i need help on too!
no problem :)
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