The expression 40 x squared minus 65 x plus 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?

A pentagon has 5 equal interior angles, so two angles measure 2/5 of the total. Calculate (2/5)(40x² − 65x + 50) = 16x² − 26x + 20, which factors as 2(8x² − 13x + 10). Thus, the expression is 2 times (8x² − 13x + 10), choice B.

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