simplify by using identity: 103 x 105
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Answered by
1
Answer:
Step-by-step explanation:
103 x 105 = (100 + 3) x (100 + 5)
therefore using identity (x + a)(x + b) = x^2 + (a + b)x + ab
(100 + 3) x (100 +5 ) = 100^2 + ( 3+5 )100 + 3x5
= 10000 + 800 + 15
= 10815
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Answered by
0
Answer:
(100+3) × (100+5)
= 100×100 + 100×3 + 100×5 + 3×5
= 10000+300+500+15
= 10815
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