Question

The factorisation of 2a - xa- 4b + 2bx is

• A. (a +2b)(2- x)
• B. (a -2b)(2 + x)
• C. (a -2b)(2- x)
• D. (a + 2b)(2 + x)

Answer 1

The correct option is C (a -2b)(2- x)

The given expression is
2a - xa - 4b + 2bx
Rearranging and grouping them we get
2a - 4b - xa + 2bx
= 2(a - 2b) - x (a - 2b) [Taking '2' and 'x' common]
= (a -2b)(2- x) [Taking (a - 2b) common]