find the area of a square whose side is[2a+7b]cm
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Answer:
4a + 28ab + 49b²
Step-by-step explanation:
- Area of a square- side × side
- So, (2a+7b) × (2a+7b) = (2a+7b)²
= (2a)² + 2×2a×7b + (7b)²
= 4a + 28ab + 49b²
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