Answer:
a^2-ab+b^2
Step-by-step explanation:
factorize both of them.
By the law of cosines, the angle

satisfies

which reduces to

which converts to approximately 77 degrees (this can be done my multiplying by 180 and dividing by pi).
Use can you slope formula:
Then, substitute values into the formula.

Then solve. You get the fraction,

. That is your slope.
Step-by-step explanation:
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