I need help with this problem x^2+2x-8=0 using the “completing the square” method step by step

Step-by-step explanation:

How do you solve #k^2-6k+8=0# by completing the square? Can every quadratic be solved by using the completing the square method? How do you know when to solve quadratics by factoring or completing the square?

c is the correct answer

step-by-step explanation:

pentagon

step-by-step explanation:

the coordinates   a(5, -2), b(3,-1),c(-4,-4) d(-3,8) and e(-1,4) forms the vertices of the polygon when they are connected in order.

in order to classify that which polygon is it with the given coordinates, first count the number of vertices and then count the number of sides it can make with these vertices.

since, the given coordinates have five vertices, therefore, it will make five sides. moreover, pentagon is regular in nature therefore it will be convex.

now, a polygon with five sides is known as pentagon, therefore, the given polygon is the pentagon.