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Zigmanuir [339]
2 years ago
10

If x+y=12 and xy=27 . find x^3+y^3pls help with steps ​

Mathematics
2 answers:
Ivan2 years ago
8 0

Answer:

Step-by-step explanation:

use formula

x^3+y^3=(x+y)^3-3*x*y(x+y)

=12^3-3*27(12)

=1728-972

=756

luda_lava [24]2 years ago
6 0

Answer:

x^3 + y^3 = 756

Step-by-step explanation:

Given that,  x+y=12 and xy=27

We know that,

( x + y )^3 = x^3 + y^3 + 3xy(x + y)

∴ 12^3 = x^3 + y^3  + 3 * 27 * 12

=> 1728  = x^3 + y^3 + 972

x^3 + y^3 = 1728 - 972

==>  x^3 + y^3 = 756

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