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Practice mode Simplification

What is the value of (0.6 × 0.6 − 0.4 × 0.4) ÷ (0.6 − 0.4)?

Correct answer B. 1

Explanation

Using a² − b² = (a + b)(a − b), the expression equals a + b = 0.6 + 0.4 = 1.

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Answer checked 11 October 2026 How we write and check questions

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