Question

ry 3
Question num
21. Factorise by splitting the middle term.
512a- 7a-1212
22. Resolve into factors :
(x + y) (a+b)-(x + y)(a+b)
23. Show with suitable example, that the product of two polynomials is
product of their H.C.F. and L.C.M.
24. Find the H.C.F. and L.C.M. of
(a - b)(a+b)?,aº – bº and 3a* + 2ab-5a²b?
is
2
25.) If a and b are two unequal rational numbers, show that
atb
lying between a and b.
Question number 26 to 27 carry 5 marks each:
26.
Prove that V5 is an irrational number.
Find the H.C.F. and L.C.M. of
-​

Answer 1

Answer:

22. Resolve into factors

(x + y) (a+b)-(x + y)(a+b)

23. Show with suitable example, that the product of two polynomials is

product of their H.C.F. and L.C.M.

24. Find the H.C.F. and L.C.M. of

(a - b)(a+b)?,aº – bº and 3a*