Question

evaluate the following using suitable identities 82Ã85

Answer 1

82×85 would be question and it's answer is

=(80+2)(80+5)

=(80)square+(2+5)80+(2)(5)

=6400+560+10

=6970

Answer 2

Answer:

7395

Step-by-step explanation:

87×85 = (90-3) (90-5)

=

$90 ^{2} + (- 3 - 5)90 + ( - 3)( - 5) \\ = 8100 - 720 + 15 \\ = 8100 - 705 \\ = 7395.$

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