Q. 4.     If a=2,b=-2,  find the value of 

             (iii)  a^{2}-b^{2}

Answers (1)
S Sayak

a2 - b2

= 22 - ( -2 )2

= 4 - 4

= 0

If a = 2 and b = -2 the value of a2 - b= 0

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