The function f ( x ) = x ^3 + 2x^2− 5 x − 6 has a root at 2. name all roots of this function.

a.-2, -1, -3

b.2, 1, 3

c.2, -1, -3

d.-2, 1, 3

sub x=1 into f(x),

remainder= 1^3+2(1)^2-5(1)-6= -8

since remainder≠0, x=1 is not a root of the function

sub x=-1,

remainder = (-1)^3+2(-1)^2-5(-1)-6= 0

by remainder theorem,

x=-1 is a root of f(x)

hence, the correct ans is c

8121 because

130,000 divided by 16 is 8121

step-by-step explanation:

two pairs of adjacent sides are of equal length. this implies that one diagonal divides the kite into congruent triangles, and so the angles between the two pairs of equal sides are equal in measure. it also implies that the diagonals are perpendicular.