What value in the place of the question mark makes the polynomial a perfect square trinomial
9. x^2+30x+?
10. x^2-? x+49

9. 225

10. 14

Step-by-step explanation:

9.

Divide the coefficient of x by 2 and square it.

30/2 = 15

15^2 = 225

225

10.

When you divide the middle coefficient by 2 and square it, you get the constant term (the third term). Here, the constant term is 49. 49 is the square of 7. Double 7 to get 14.

14

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.

try soting them out first

step-by-step explanation: