Simplification · Question 26 · Medium
Simplify: 4.7 × 4.7 + 2 × 4.7 × 5.3 + 5.3 × 5.3
- 10
- 50.18
- 110
- 100
Answer and explanation
Answer: D. 100
Explanation: This is a² + 2ab + b² = (a + b)² with a = 4.7 and b = 5.3. So the value is (10)² = 100.
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