Question

x²-x-20=0 by factorization method​

Answer 1

Answer:

x= 5, -4

Step-by-step explanation:

x²-x-20=x²-5x+4x-20=x(x-5)+4(x-5)=(x-5)(x+4)

Now there can be two cases,

Either,

(x-5)(x+4)=0 ; (x-5)=0*(x+4)

(x-5) =0 and x=5

Or,

(x-5)(x+4)=0 ; (x+4)=0*(x-5)

(x+4)=0 and x=-4

Therefore,

x= 5, -4