Solve 99x98 using identities.
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Answered by
5
(100-1)×(100-2)
=(x-a)(x-b) = x² - x(a+b) + ab.
=100^2 - 100(1+2) + (1×2)
=10000 - 300 + 2
=9702
=(x-a)(x-b) = x² - x(a+b) + ab.
=100^2 - 100(1+2) + (1×2)
=10000 - 300 + 2
=9702
Answered by
2
99×98
=> (100-1)×(100-2)
(x-a)(x-b) = x²-x(a+b)+ab
=> (100)²–100(1+2)+1×2
=> 10000–300+2
=> 9700+2 = 9702
=> (100-1)×(100-2)
(x-a)(x-b) = x²-x(a+b)+ab
=> (100)²–100(1+2)+1×2
=> 10000–300+2
=> 9700+2 = 9702
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