Question

evaluate 8.3x7.7 using identities​

Answer 1

Answer:

$8.3 \times 7.7 \\ (8 + 0.3)(8 - 0.3) \\ ( {8}) {}^{2} - (0.3) {}^{2} \\ 64 - 0.09 \\ 63.91$

Answer 2

Answer:

63.91

Step-by-step explanation:

8.3 × 7.7

=(8 + 0.3) (8 - 0.3)

= 8² - (0.3)² ( (a+b)(a-b) = a² - b² )

=64 - 0.09

=63.91

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