Which shows one way to determine the factors of x3 + 4x2 + 5x + 20 by grouping?

Group the polynomial as (x³ + 4x²) + (5x + 20). Factor each group: x²(x + 4) + 5(x + 4). Both terms share the factor (x + 4), so this is the grouping that leads to the factorization (x + 4)(x² + 5).

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