20. Find the value of 8x3 +
27y3, if 2x+ 3y =8 and xy=2
O 226
O 228
O 224
O 220
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Answered by
0
Step-by-step explanation:
Here you go the answer mate
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Answered by
1
Answer:
224
Step-by-step explanation:
2X +3Y = 8
8X^3 + 27Y^3 = 2(X)^3 + (3Y)^3
= (2X +3Y) x [(2X)^2 - 2X x 3Y +(3Y^2)
= 8 x [(2X+3Y)^2-2 x 2X x 3Y - 6XY)
= 8 x (8^2 - 18 x 2)
= 8 x (64 - 36)
= 8 x 28
= 224
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