The above shows part of the graph of the function y=−0.2(x+2)6+(x+2)4.What is the multiplicity of the root at x=−2?
The equation of the common tangent to the circles x2 + y2 − 4x + 6y − 12 = 0 and x2 + y2 + 6x + 18y + 26 = 0 at their point of contact.
Draw the graph of y=x2−4x+6 and show that it does not have real roots.
The number of common tangents to the circles x2 + y2 – 4x – 6y -12 = 0 and x2 + y2 + 6x +18y + 26 = 0 is: