Question

is x=-1 is the root of the quadratic equation x² -3x -4=0​

Answer 1

Answer:

yes x = -1 is the root of the equation

Step-by-step explanation:

x^ -3x -4 =0

x^ -4x + 1x -4 =0

x ( x -4) +1 (x-4) =0

(x-4 ) ( x +1 ) =0

x +1 =0

x = -1

Answer 2

Answer:

Yes. -1 and 4 are the roots of the quadratic equation.

Step-by-step explanation:

x^2-3x-4 = 0

x^2-4x+x-4 = 0

X(x-4)+1(x-4) = 0

(x-4)(X+1) = 0

x-4 = 0

X = 4

x+1 = 0

X = -1