1. Radii of the circles are given below, find their areas.
(1) 28 cm
(2) 10.5 cm (3) 17.5 cm​

i have done the solution calculate yourself

a) justify

step-by-step explanation:

justifying is just part of everyday life. justify kind of means proof so i think the answer is a) justify.

f(x) = x^3 -2x^2 -3x

x( x^2 -2x-3)

x( x^2 +x -3x -3)

x( x(x+1) -3(x+1))

x( x-3)( x+1)

so zeroes are 0, 3,-1

its (2) option