Question

factorise 6x^3 -15xy^2

Answer 1

start with
\[3x(2x^2-5y^2)\]

Answer 2

3x(6x^2 - 5y^2)
3x( xsqrt2 - ysqrt5)( xsqrt2 + ysqrt5)

Answer 3

then what hobolos said, if you are allowed square roots. get
\[3x(\sqrt{2}x+\sqrt{5}y)(\sqrt{2}x-\sqrt{5}y)\]

Answer 4

thanks!

Answer 5

good work