Question

EXERCISE 4.3
Factorise the following (1 to 17):
(i) 4x2 – 25y2
(ii) 9x2 - 1.
1​

Answer 1

Answer:

$(i)({2x)}^{2} - ( {5y)}^{2} \\ \\ {a}^{2} - {b}^{2} = (a - b)(a + b) \\ \\ (2x - 5y)(2x + 5y) \\ \\ \\ (ii)( {3x)}^{2} - ( {1)}^{2} \\ (3x - 1)(3x + 1)$