Question

Can u plz help me doing all these sums!plzzz

Answer 1

yes, we put all question one formula :- a^2-b^2 ==> (a+b) (a-b)

formula

QUESTION = 20

==> X^2-1/9

==> (X)^2 - (1/3)^2

==> (X+1/3) (X-1/3)

QUESTION = 21

4/25(M)^2-64

==>  (2/5 M)^2 - (8)^2

==> (2/5m - 8) (2/5m + 8 )

OUESTION = 22

X^2/9-Y^2/4

==> (X/3)^2 - (Y/2)^2

==> (X/3-Y/2) (X/3+Y/2)

QUESTION = 23

36/a^2 - 25/b^2

==> (6/a)^2 - (5/b)^2

==> (6/a-5/b) (6/a+5/b)