1.) Write in factored form : x^2 + 3x -21 (show all work including factors of C and sum of B!)

2.) Write 56xy^3 as a prime factorization
(show all work)

3.) What are the roots of the polynomial equation : 4k^2 - 144 = 0
(show all work)

what do you need me to answer?

step-by-step explanation:

< 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⭐