Find the value of the expression below for x=10

x² - 2(x + 5)

a. 10
b. 70
c. 85
d. 90

Answer is B

Work:
10^2 -2(10+5)
100- 2(15)
100-30
=70

“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .