0.3r = 2.1
A r = 0.7
B r = 1.8
C r = 7
D r = 18

answer: the correct one is a

step-by-step explanation:

answ9x x 3=

step-by-step explanation:

the image is given below

since the options are not given so we draw it from the equation

the given equation is

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

y = y² + 3x - 4

the above equation is a quadratic equation which will have two roots. if we draw the graph for it, it will look like this