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Use the grouping method to factor 4x3+20x2-3x-15
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Use the grouping method to factor 4x3+20x2-3x-15

User Dsmart
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4x³ + 20x² -3x - 15

4x²(x + 5) -3(x + 5)

= (4x² - 3) (x + 5)

User Jonas Wouters
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