Question

factorise each of the following cubic polynomials by factor theorem




2x²+x²-2x-1

please solve this

class 9 th ​

Answer 1

Step-by-step explanation:

2x² +x²-2x-1

=> 3x²-2x-1

=>3x²-3x+x-1

=>3x(x-1)+1(x-1)

=>(x-1)(3x+1)

either

x-1= 0

x= 1

or

3x+1= 0

3x= -1

x= -1/3

hope it's helpful.

take care and stay safe.

Answer 2

Answer

factorisation :

2x² + x² - 2x - 1

=> 3x² - 2x - 1

=> 3x² - 3x + x - 1

= > 3x(x - 1) + 1(x - 1)

=> (3x + 1)(x - 1)

=> 3x + 1 = 0 or x - 1 = 0

=> x = -1/3 or x = 1