Verified answer

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‿︵‿︵‿୨ ୧‿︵‿︵‿

We are given the formula (a + b)(a –

b) = a² - b².

We know, 8.3 x 7.7 (8+0.3)(8 -0.3), = where a = 8 and b = 0.3.

Now, solve as shown below:

8.3 × 7.7

= (8+0.3)(80.3) = 82 - (0.3)2

→ 8.3 × 7.7 = 64 -0.09

8.3 x 7.7 63.91. =

Hence, 8.3 × 7.7 = 63.91.

‿︵‿︵‿୨ ୧‿︵‿︵‿

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We are given the formula (a + b)(a –

b) = a² - b².

We know, 8.3 x 7.7 (8+0.3)(8 -0.3), = where a = 8 and b = 0.3.

Now, solve as shown below:

8.3 × 7.7

= (8+0.3)(80.3) = 82 - (0.3)2

→ 8.3 × 7.7 = 64 -0.09

8.3 x 7.7 63.91. =

Hence, 8.3 × 7.7 = 63.91.

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