A)
4x²y³ + 5y - 3x = 4(1)²(-1)³ + 5(-1) - 3(1) = 4(1)(-1) - 5 - 3 = -4 - 5 - 3 = -12
7y^4x² + 4x³y² = 7(-1)^4(1)² + 4(1)³(-1)² = 7(1)(1) + 4(1)(1) = 7 + 4 = 11
-4X^4 + 14X² + 9 = -4(1)^4 + 14(1)² + 9 = -4(1) + 14(1) + 9 = -4 +14 + 9 = 19
9y^6 + 11y³ + 25x = 9(-1)^6 + 11(-1)³ + 25(1) = 9(1) + 11(-1) + 25(1) = 9 - 11 + 25 = 23
3x³y - 6x²y² + 5 - 9y³x =
= 3(1)³(-1) - 6(1)²(-1)² + 5 - 9(-1)³(1) = 3(1)(-1) - 6(1)(1) + 5 - 9(-1)(1)
= -3 - 6 + 5 + 9 = 5
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A)
4x²y³ + 5y - 3x = 4(1)²(-1)³ + 5(-1) - 3(1) = 4(1)(-1) - 5 - 3 = -4 - 5 - 3 = -12
7y^4x² + 4x³y² = 7(-1)^4(1)² + 4(1)³(-1)² = 7(1)(1) + 4(1)(1) = 7 + 4 = 11
-4X^4 + 14X² + 9 = -4(1)^4 + 14(1)² + 9 = -4(1) + 14(1) + 9 = -4 +14 + 9 = 19
9y^6 + 11y³ + 25x = 9(-1)^6 + 11(-1)³ + 25(1) = 9(1) + 11(-1) + 25(1) = 9 - 11 + 25 = 23
3x³y - 6x²y² + 5 - 9y³x =
= 3(1)³(-1) - 6(1)²(-1)² + 5 - 9(-1)³(1) = 3(1)(-1) - 6(1)(1) + 5 - 9(-1)(1)
= -3 - 6 + 5 + 9 = 5