Q9. Expand using brackets and solve 17×109
Answers
Answered by
41
Answer:
⇒1 7 × 109
=(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
Answered by
2
Answer:
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