In the diagram below, DE and EF are tangent to OO. What is the measure of DÈ?
O A. 86
O B. 94
.
o
274
EX 94-
O C. 90
O D. 188

- 2 + 10x³ - 21x² + 19x - 4

step-by-step explanation:

each term in the second factor is multiplied by each term in the first factor

x²(- 2x² + 4x - 1) - 3x(- 2x² + 4x - 1) + 4(- 2x² + 4x - 1) ← distribute

= - 2 + 4x³ - x² + 6x³ - 12x² + 3x -8x² + 16x - 4

collect like terms

= - 2 + 10x³ - 21x² + 19x - 4 ← in standard form

i'm assuming that it's c.)   volcanoes built the mountains and earthquakes tore them down.