Question

x^4-6x^3-7x^2=0 ,x1=?,x2=?,x3=?,x4=?

Answer 1

So you factor this into:
x^2(x^2-6x-7)=0
factor what is inside the parenthesis and get:
x^2(x-7)(x+1)=
The double root means you will have 0 twice, 7. and -1 as the roots

Answer 2

what does that mean double root could u plz explain

Answer 3

the double root is 0
x^2 = 0