Answer:
add them all and put them equal to 180 cause all interiors angles of a triangle adds up to 180.
Explanation:
x^2+6x+68=180
x^2+6x-112=0
(x-8)(x+14)
x=8
x^2+1=65
2x+24=40
4x+43=75
hence x^2+1 is your answer
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