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प्रश्न
(5 + 20)(–20 – 5) = ?
विकल्प
− 425
375
− 625
0
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उत्तर
– 625
Explanation;
Hint: (50 + 20)(–20 – 5) = – (5 + 20)2
= – (25)2
= – 625
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