if X + Y is equal to 4 and X Y is equal to 5 find the value of x cube + y cube
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Answered by
2
x cube +y cube =(x+y)^3-3x^2y-3xy^2
=4^3-15x-15y
=64-15 (4)
=64-60
=4
keertana2004:
sorry for disturbing you
no problem
which standard are you
can u please tell me the formula again
9 th class and u
(a+b) cube =a cube + 3x square y +3y square x+ bcube
thanks
i am 12 th class
mm
ok
Answered by
1
using this identity we get the answer
Attachments:
now you understand? bro
yes i understood
thanks a lot
wlc
if you have any other doubt then ask me
sure
can u please rationalize the denominator of 4√3+5√2÷4√3+3√2
rationalise the value and your will get the answer
ok
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