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Expand 27x3+125y3.
☺(3x+5y)(9x2-15xy+25y2)
☺(3x-5y)(9x2-15xy+25y2)
☺(3x+5y)(9x2+15xy+25y2)
Which One is Correct

Answer 1

Are you expanding or factoring?

Answer 2

Asking..

Answer 3

Expand 27x3+125y3.
2 7 x 3 + 1 2 5 y 3 .

Answer 4

Oh, and\[\rm a^3 + b^3 = (a +b)(a^2 - ab + b^2)\]

Answer 5

I think expanding means the same as factoring here.

Answer 6

Good to note here that 27x^3+125y^3
= 3^3x^3 + 5^3y^3
= (3x)^3 + (5y)^3

Answer 7

And then use that silly thing I wrote in my last reply.