Algebra-1

To factor the polynomial 4r³ + 7r² + 20r + 35 using the factor by grouping method, let's follow these steps:

Step 1: Group the terms:
(4r³ + 7r²) + (20r + 35)

Step 2: Factor out the common factor from each group:
In the first group, we can factor out r²: r²(4r + 7).
In the second group, we can factor out 5: 5(4r + 7).

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