please find the answer please
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Answer:
Solution:
Given data:
(x + y)3 + 8 (x - y)3 = (3x + Ay) (3x2 + Bxy + Cy2) ----(1)
Concept used:
a3 + b3 = (a + b)(a2 – ab + b2)
Calculation:
(x + y)3 + 8 (x - y)3
⇒ (x + y)3 + [2 (x – y)]3
⇒ [x + y + 2 (x – y)] {(x + y)2 – (x + y) × 2 (x – y) + (2x – 2y)2}
⇒ (x + y + 2x – 2y) [x2 + 2xy + y2 – (x + y) (2x – 2y) + (4x2 – 8xy + 4y2)]
⇒ (3x – y) [x2 + 2xy + y2 – (2x2 – 2xy + 2xy – 2y2) + 4x2 – 8xy + 4y2]
⇒ (3x – y) (5x2 – 6xy + 5y2 – 2x2 + 2y2)
⇒ (3x – y) (3x2 – 6xy + 7y2)
Comparing coefficients of terms with equation 1,
⇒ A = -1
⇒ B = -6
⇒ C = 7
⇒ A + B + C = -1 + -6 + 7
⇒ A + B + C = 0
∴ The value of A + B + C is 0.
Hope this helps.
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Answered by
3
Answer:
x²y³ + 3x³y³ + 3x²y³- 4x³y³
-x³y³ + 4x²y³
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