After being rearranged and simplified, which equation cannot be solved using the quadratic formula?
O A. 5x2 – 3x + 10 = 2x2
O B. x2 - 6x - 7 = 2x
O C. 2x - 4 = 2x2
O D. 2x2 – 3x + 10 = 2x2 + 21

In the following diagram it is given that dec,ab || dc, ad || eb, and ad is congruent to bc. a)why isn't abc a parallelogram even though it has a pair of parallel sides and a pair of congruent sides b)explain why be must be congruent to bc. further explain what type of triangle this makes triangle abc and what it tells you about angle 1 and angle 2c) finally why must angle 3 be congruent to angle 1? further, explain why we know that angle 3 is congruent to angle 2