Sin2a - sin 2b + sin2c equals to 4 Cos A . sin b . cosc
prove form right hand side

where is the image?

step-by-step explanation:

it is b)

hope this : )

step-by-step explanation:

-4

step-by-step explanation:

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.