Question

Which is a completely factored form of 27x^3+y^6
1. (3x+y^2)^3
2. (3x+y^2)(9x^2+y^4)
3. (3x-y^2)(9x^2+3xy^2+y^4)
4. (3x+y^2)(9x^2-3xy^2+y^4)

Answer 1

can u tell me what does \(a^3 + b^3 \) equal to?
u know \(27x^3 + y^6 = (3x)^3 + (y^2)^3 \)

Answer 2

I have no idea how to do this Im trying to learn

Answer 3

well,\[x^3 + b^3 = (a+b)(a^2+b^2 - ab )\]

Answer 4

now put \(a=3x \) and \(b=y^2 \) in that equation

Answer 5

* sry \(a^3\) i put \(x^3\) by mistake

Answer 6

ok but where does the y^2 come from

Answer 7

\(y^6 = (y^2)^3 \)

Answer 8

oh ok

Answer 9

take cube root for fist one and then take cube of second

Answer 10

wait


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