Mitch is replacing all the light bulbs in his home with energy efficient LED light bulbs. How many packages of 4 will he need to buy to replace 86 light bulbs in his home?

A) 20
B) 21
C) 22
D) 23

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