Question

factorise : (1)x(a-5)+y(5-a).
(2)4(a+b)-6(a+b)^2.
(3) 8(3a-2b)^2-10(3a-2b).​

Answer 1

Let y=8(3a−2b)

2

−10(3a−2b)

taking (3a−2b) common we get

y=(3a−2b)[8(3a−2b)−10]

y=(3a−2b)[24a−16b−10]

on solving we get

y=72a

2

−48ab−30a−48ab+32b

2

+20b

y=72a

2

+32b

2

−96ab−30a+20b

y=72a

2

−30a+32b

2

+20b−96ab.