Question

factorise :- x^2+2x-1
no spam​

Answer 1

Answer:

easy, x²+2x-1

=>(x)²+2(x)(1)+(-1)²

=>(x+1)²

we haven't chosen (x-1)² since when it will expand, it will give -2ab, which is not the original one

Answer 2

this factorisation method is called middle spilt term factorisation . let see this method bro

In this method u have to spilt the middle term . in this ouestion I do the last digit is 1 so 1×1 =1 so here I will do 1x+1x because we have to split the middle term and as we know that in the ouestion there is 2x

x2 +1x+1x-1

x(x-1)+ 1(x-1) so, my friend the answer will be

(x-1) (X+1)

this is the answer see bro it's easy . I hope that you are intelligent because intelligent people can understand this like u Please mark me as brainlast