If x + y = 27 and xy = 210 then find the value of x cube + y cube
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Hey mate!
Here is your answer > >
(x+y)^2=x^2+y^2+2xy
(27)^2=x^2+y^2+2×210
729-420=x^2+y^2
309=x^2+y^2
We know that
x^3+y^3=(x+y)(x^2+y^2-xy)
=(27)(309-210)
=27×99
=2673
Hope it helps!
Thankyou ☆ ☆
Here is your answer > >
(x+y)^2=x^2+y^2+2xy
(27)^2=x^2+y^2+2×210
729-420=x^2+y^2
309=x^2+y^2
We know that
x^3+y^3=(x+y)(x^2+y^2-xy)
=(27)(309-210)
=27×99
=2673
Hope it helps!
Thankyou ☆ ☆
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