Simplify this expression: 54 + 31 + 7n by the power of 2 - n by the power of 2

6n²  +85

Step-by-step explanation:

Changes made to your input should not affect the solution:

(1): "n2"   was replaced by   "n^2".  1 more similar replacement(s).

(85 +  7n²) -  n²

< coa = 150 ( given)

as ba and bc are tangents

so oc and oa is perpendicular to cb and ab respectively because in circle normal passes through centre

so in quadrilateral oabc

< coa + < oab + < ocb + < abc = 360

150 +90+90 + < abc = 360

330 + < abc = 360

< abc = 360 -330 = 30

so < abc = 30

⭐dhruv⭐