) If x = –1, y = 1, z = 2, find the value of 2x2 y + 3yz3 – 4x2
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Answer:
answer is simple 23 is correct
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2x² y + 3yz³ - 4x²
2 (-1)² 1 + 3 × 1 × (2)³ - 4 × (-1)²
2 + 24 - 4
2 + 20
22
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