Question

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

Provide the factors

Answer 1

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

Answer 2

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)

Answer 3

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

Answer 4

is that right?

Answer 5

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

Answer 6

sorry i was just making sure o.O

Answer 7

great job!

Answer 8

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

Answer 9

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

Answer 10

eyust you never answer my last question on the other problem

Answer 11

yeah - good luck