Answer:
4x² + 4x + 1
Step-by-step explanation:
We know that (a + b)² = a² + 2ab + b², therefore, (2x + 1)² = 4x² + 4x + 1.
<u>U = mgh = (1250 kg)(9.8 m/s2)(2m) = ? J</u>
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