please help!
Explain, in complete sentences, how you would factor 27x4 – 90x2 + 75.

Provide the factors

Question

please help! 
Explain, in complete sentences, how you would factor 27x4 – 90x2 + 75.

Provide the factors

cwrw238 · Answer

notice that 27, 90 and 75 are all divisible by 3
so we can write
3(9x^4 - 30x^2 + 25)
now you can try to factor whats in parentheses

cwrw238 · Answer

we must now look for 4 numbers which are factors of 9 and 25 which give us a product of 25 and when multiplied and added give us the middle number -30
to give factors of the form

(ax^2 + b)(cx^2 + d)

anonymous · Answer

3(3x^2-5)(3x^2-5)

anonymous · Answer

is that right?

cwrw238 · Answer

I do this by trial and error - yeah - thats right - why are you asking?!!

anonymous · Answer

sorry i was just making sure o.O

eyust707 · Answer

great job!

cwrw238 · Answer

thats ok - thats as far as you can go  3x^ -5 won't factor

anonymous · Answer

thank you eyust & ohhh okay thanks & you're a little fiesty lolol

anonymous · Answer

eyust you never answer my last question on the other problem

cwrw238 · Answer

yeah - good luck