Which of the binomials below is a factor of this trinomial?

x2 + x - 20

a.

x - 4

b.

x + 2

c.

x - 2

d.

x + 4

(x-4) is a factor

Step-by-step explanation:

To factor this trinomial , we find out two factors whose product is -20 and sum is +1

Now we use factors 5 and -4

Take out GCF from each group

Factor out x+5

So (x-4) is a factor

< 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⭐