Question

plzzz factorise ab2+(a-1)b-1??​

Answer 1

$a {b}^{2} + (a - 1)b - 1 = 0$

$a {b}^{2} + ab - b - 1 = 0$

$ab(b + 1) - 1(b + 1) = 0$

$(ab - 1)(b + 1) = 0$

plz follow

Answer 2

Answer:

$\huge\mathfrak\pink{Solution :-}$

Step-by-step explanation:

Method (1)

ab²+(A-1)b-1=0.

use b²-4ac

(a-1)²-4(a)(-1)

(a-1)²+4a

a²+1-2a+4a.

a²+1+2a

(a+1)²

(a+1)(a-1)=0

a=1 ,a=-1.

Method (II)

By formula method

x=(a-1)±root(a+1)²/2a

x=(a-1)±(a+1)/2a

x=a-1+a+1/2a

x=2a/2a=1. or. x=a-1-a+1/2=-2/2=-1

The roots are (1,-1) OK

√ this is urs correct answer