Question

The expression 40x2 – 65x + 50 represents the sum of the interior angles of a regular pentagon in degrees. If the interior angles of the pentagon are equal, which expression represents the measure of two angles?

2x2(20 – 32x + 25x2)
2(8x2 – 13x +10)
5x2(8x2 – 13x + 10)
5(3x2 – 8x + 5)

Answer 1

Sum for one angle = (40x^2 − 65x + 50)/5 = 8x^2 − 13x + 10. Two angles = 2(8x^2 − 13x + 10).

So the correct choice is 2(8x2 – 13x +10).