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Mathematics 14 Online
OpenStudy (anonymous):

expand (x^6-y^6)

OpenStudy (anonymous):

ok

OpenStudy (anonymous):

\[(x ^{3})^{2}-(y ^{3})^{2}\]

OpenStudy (anonymous):

Start with that, then expand according to the formulae.

OpenStudy (anonymous):

what formulae

OpenStudy (anonymous):

a^2 - b^2

OpenStudy (anonymous):

difference of squares

OpenStudy (anonymous):

\[(x ^{3})^{2}-(y ^{3})^2 = (x ^{3}+y ^{3})*(x ^{3}-y ^{3})\]

OpenStudy (anonymous):

Now apply the formula for x^3 + y^3 and x^3 - y^3

OpenStudy (anonymous):

i do not the formulae you speak of

OpenStudy (anonymous):

what is it called?

OpenStudy (anonymous):

(a^3-b^3)=(a –b)(a²+ ab+ b²)

OpenStudy (anonymous):

is that the formulae

OpenStudy (anonymous):

\[(x ^{3})^{2}-(y ^{3})^{2}=(x ^{3}+y ^{3})*(x ^{3}-y ^{3})=[(x-y)*(x ^{2}+xy+y ^{2})]*[(x+y)*(x ^{2}-xy+y ^{2})]\]

OpenStudy (anonymous):

i can not see it all

OpenStudy (anonymous):

Expand (x^3 +y^3) and (x^3-y^3) (x^3+y^3) = (x+y)*(x^2+y^2-xy) (X^3-y^3) = (x-y)*(x^2+xy+y^2)

OpenStudy (anonymous):

great job thanks

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