Question

2x^2+x-1=0 find the root of the following quadratic equation by factorisation​

Answer 1

Step-by-step explanation:

$2 {x}^{2} + x - 1 \\ = 2 {x}^{2} + 2x - x - 1 \\ = 2x(x + 1) - 1(x + 1) \\ = (2x - 1)(x + 1)$

so roots are 1/2 and -1

Answer 2

Hey ,
This is your answer.
Refer to the below attached photo


Thankyou!!