Advertisements
Advertisements
प्रश्न
Factorise : 1 - 2a - 2b - 3 (a + b)2
उत्तर
1 - 2a - 2b - 3 (a + b)2
1 - 2(a + b) - 3(a + b)2
Let a + b = x
= 1 - 2x - 3x2
= -3x2 - 2x + 1
= - [3x2 + 2x - 1]
= - [3x2 + (3 - 1)x - 1]
= - [3x2 + 3x - 1x - 1]
= - [3x + (x + 1) - 1(x + 1]
= - (x + 1) (3x - 1)
= (x + 1) (1 - 3x)
= (a + b + 1) [1 - 3(a + b)]
= (a + b + 1) (1 - 3a - 3b)
APPEARS IN
संबंधित प्रश्न
Factorise.
y2 + 24y + 144
Factorise.
20x2 − 26x + 8
Factorise:
a(3a - 2) - 1
Factories: (x2 - 3x)(x2 - 3x - 1) - 20.
Find trinomial (quadratic expression), given below, find whether it is factorisable or not. Factorise, if possible.
2x2 - 7x - 15
Factorise the following by splitting the middle term:
x2 + 6x + 8
Factorise the following:
(2p + q)2 - 10p - 5q - 6
Factorise the following:
y2 + 3y + 2 + by + 2b
Factorise the following:
(a2 - 2a)2 - 23(a2 - 2a) + 120
Factorise the following:
(y2 - 3y)(y2 - 3y + 7) + 10
