Question
Download Solution PDFWhat is the value of (27x3 + 58x2y + 31xy2 + 8y3), when x = 5 and y = -7?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFFormula used:
(A + B)3 = A3 + 3A2B + 3 AB2 + B3
Calculation:
(27x3 + 58x2y + 31xy2 + 8y3)
⇒ (3x + 2y)3 - 5xy2 + 4x2y
⇒ 1 - 5 × 5 × 49 + 4 × 52 × (-7) = -1924
∴ The correct option is 3
Last updated on Jul 12, 2025
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