find the value of 64x³+125z³if 4x+5y=16 and xz=12
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Answered by
0
4x whole cube + 5z whole cube
4x + 5z X. 16xsquare + 25zsquare - 20xz
16. x. 4x+5z wholesquare -240
16 whole cube - 240
3856
4x + 5z X. 16xsquare + 25zsquare - 20xz
16. x. 4x+5z wholesquare -240
16 whole cube - 240
3856
krishnachandel0:
no it's wrong
ans is 15616
No i am right
i have answers but do not have the solutions of this ques
Answered by
1
64x³+125z³
=(4x)³+(5z)³
a³+b³=(a+b)³-3ab(a+b)
=(4x+5z)³-3(4x)(5z)[4x+5z]
=(16)³-60xz(16)
=4096-960(12)
=4096-11520
= -7424
Hope it helps
=(4x)³+(5z)³
a³+b³=(a+b)³-3ab(a+b)
=(4x+5z)³-3(4x)(5z)[4x+5z]
=(16)³-60xz(16)
=4096-960(12)
=4096-11520
= -7424
Hope it helps
can u do this ques again bcz by mistake i have written the wrong ques
pls i rqst u pls help me
find the value of 64x³+125z³ if 4x-5z=16and xz==12
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