Answer:
hope this helps
Explanation:
Please fallow the steps it will help you
Step1: 4x^3 + 28x^2 + 7x + 49
Step 2: 4x^2(x+7) + 7(x+7)
Step 3: (4x^2+7)(x+7)
Step 4: (x+7)(4x^2+7)
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