What is the sign of a\cdot\left(\dfrac {-b}{b}\right)a⋅( b
−b

)a, dot, left parenthesis, start fraction, minus, b, divided by, b, end fraction, right parenthesis when a=0a=0a, equals, 0 and b<0b<0b, is less than, 0?

nope.   happens to me as well.

-aparri

the answer is 13 cm

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

what chart am i supposed to follow?