any solve me this one pls help solve step by step
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any solve me this one pls help solve step by step
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Answer:
756
Step-by-step explanation:
a³+b³ =(a+b)³-3ab(a+b)
=(12)³-3×27×12
=1728-972
=756
Answer:
63
Step-by-step explanation:
a + b = 12 ab = 27
a cube + b cube = (a + b)( a square + b square - ab)
= (12) ( 81 + 9 - 27)
= 12*(90- 27)
= 12 ( 63)
= 756
(a - b) square = ( a + b) square - 4ab
= 12 square - 4*27
= 144 -108
= 36
a - b = 6
by solving a-b and a+b we get a = 9 and b =3