Find the product of 25x²[1-⅕x] and 3valuate its value when x=-2
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Answer:
25x²[1-⅕x] × 3
{25x² ×1} - {25x²× ⅕x} × 3
25x² - 5x³ × 3
25x² - 15x³
ATQ:
x = -2
25x² = 25 × -2 × -2 = 100
15x³ = 15 × -2 × -2 = -120
25x² - 15x³
100 - (-120)
100 + 120
220
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