Question

56.
Find the LCM of the polynomials:
90(x - 5x+6)(2x + 1)' and 140(x-3) (2x15x + 7)
(A) 1260(x-2)(x - 3)(2x + 1)(x + 7) (B) 1260(x-2)(x + 2) (2x + 1)(x + 7)
(C) 1260(x - 2)(x - 3) (2x + 1)(x7) (D) 1260(x - 2)(x - 3)' (2x - 1)(x + 7)​

Answer 1

Answer:

L.C.M  $=1260(x - 2)(x - 3)(x + 7)(2x + 1)$

Option (A) is correct Answer.

Step-by-step explanation:

$90(x^2 - 5x + 6)(2x + 1)$

$=90(x^2 - 2x - 3x + 6)(2x + 1)$

$=90(x - 2)(x - 3)(2x + 1)$

And $140(x - 3)(2x^2 + 15x + 7)$

$=140(x - 3)(2x^2 + x + 14x + 7)$

$=140(x - 3)(2x + 1)(x + 7)$

L.C.M $=10.9.14(x - 2)(x - 3)(x + 7)(2x + 1)$ $=1260(x - 2)(x - 3)(x + 7)(2x + 1)$

Option (A) is correct Answer.