Question

Please answer these questions, urgent, please do not spam, step by step, please answer ​

Answer 1

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A) ⤵

${82}^{2} - {18}^{2}$

Using the identity a^2 - b^2 = (a - b)(a + b)

${82}^{2} - {18}^{2} = (82 - 18)(82 + 18)$

$64 \times 100$

$6400$

B)⤵

=> 95 × 105

=> (100 - 5)( 100 + 5)

=> 100^2 - 5^2

=> 10000 - 25

=> 9975

C) Use this same identity (Like above)

D) 65^2 - 20^2 / 85

=> (65 - 20) ( 65 + 20 ) / 85

=> 45 × 85 / 85

=> 45

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Answer 2

a)82^2 - 18^2

(a^2 - b^2) =(82+18)(82-18)

=(100)(64)

=(6400)

b)95×105

=(100-5)(100+5) (a-b)(a+b)=a^2-b^2

=100^2 - 5^2

=10000-25

=9975

c)196×204

=(200-4)(200+4) (a-b)(a+b)=a^2-b^2

=200^2-4^2

=40000-16

=39984

d)65^2 - 20^2 / 85

(65+20)(65-20) / 85 (a-b)(a+b)=a^2-b^2

=(85)(45) / 85

=3825 / 85

=45