Question

Evaluate, using the identity a²-b²=(a+b)(a-b)
(1) 38²-36²
(ii) 87²-77²
(iii) (1074)²-(1073)²​

Answer 1

Answer:

Step-by-step explanation:

i) 38² - 36²

= (38+36)(38-36)

= 74*2

= 148.

ii) 87² - 77²

=(87+77)(87-77)

= 164*10

= 1640

iii) 1074² - 1073²

= (1074+1073)(1074-1073)

= 2147*1

= 2147

Answer 2

(i)38²-36²=(38+36)(38-36)

               = 74*2

               =148

(ii)87²-77²=(87+77)(87-77)

              =164*10

              =1640

(iii) (1074)²-(1073)²=(1074+1073)(1074-1073)

                            =2147*1

                            =2147

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