Find the measure of the exterior angle of the triangle

hi, i am not sure about this one but i think its d,

hope this !

2 x^2 -3x+p

sum of roots = 3/2

let other root be x

3+ x = 3/2

x= 3/2 - 3 = -3/2

product of roots = p/2

3× -3/2 = p/2

-9 = p

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answer: i'm great at algebra

~coco

step-by-step explanation:

m∠a is 90°

m∠b is 40°