The value of 10-2- 9-8 is-

10.2 #215;9.8 = (10+.2)(10 .2) = (10^2) (.2^2) = (100 .04) = 99.96 ...

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Factorisation Using Algebraic Identities

The value of ...

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The value of $10.2 \times 9.8$ is:

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Question 86 (xiv)

Using suitable identities, evaluate the following:

$9.8 \times 10.2$

(a + b) (a - b) = a^{2} - b^{2}

9.8 \times 10.2

42. 3 - 10.2

N a^{+}

I E_{1}

N a = 5.1 e V

Can’t you easily find the products below like this?

(i) 51 × 49

(ii) 98 × 102

(iii) 10.2 × 9.8

(iv) 7.3 × 6.7

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