Question

14. a
²– b²



=

a) 2ab b) –2ab c) (a+b)(a–b) d) ab

15. Circumference of a circle is

a) 2¶r b) ¶r c) ¶r²

d) 2¶r²​

Answer 1

14 :-

As we know that,

${a}^{2} - {b}^{2} = (a + b)(a - b)$

Hence , Correct Answer is c)

15 :-

As we know that ,

Circumference Of Circle = 2πr

Hence , Correct Answer is a) .