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प्रश्न
By solving (60 – 70) × (60 + 70) we get ______.
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उत्तर
By solving (60 – 70) × (60 + 70) we get 0.
Explanation:
Using law of exponents,
a0 = 1 ...[∵ a is non-zero integer]
∴ (60 – 70) × (60 + 70) = (1 – 1) × (1 + 1)
= 0 × 2
= 0
Hence, (60 – 70) × (60 + 70) = 0
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