The correct option is A 9988Apply the formula (a + b) (a – b) = a2 – b2 (100 2)(100+2) = (100)2 – (2)2 =10000 4 = ...

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Ionic Compounds: Chemical Formula

Evaluate 98 x...

Question

Evaluate 98 x 102.

9988

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9996

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9898

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9899

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Solution

The correct option is A
9988

Apply the formula (a + b) (a – b) = a² – b²

(100-2)(100+2) = (100)² – (2)²

=10000 - 4

=9996

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Similar questions

102 \times 98

Evaluate these using identity:

(i) 55 × 45; (ii) 33 × 27; (iii) 8.5 × 9.5; (iv) 102 × 98.

Using binomial theorem evaluate each of the following:

$(i) (96)^{3} (i i) (102)^{5} (i i i) (101)^{4} (i v) (98)^{5}$

\int_{10}^{2} (x^{2} + x + 2) d x

98 \times 10^{2}

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