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Q9. Expand using brackets and solve 17×109 |
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Answer» Answer: =(20-3)× (100 +9) We will use FOLLOWING Identity (x+a)(x+b)=x²+(a+b)x+ab =20×(100 +9) -3×(100+9) =20×100 +20×9 -3×100-3×9 =2000+180-300-27 =2180 -327 = 1853
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