Ar which root does the graph of p(x) = (x + 4)(x + 7) cross the x-axis?

(-4,0)(-7,0)

Step-by-step explanation:

The x axis is crossed when y = 0.

That happens in two places.

x +4=0 is one place

x = - 4 when it does.

x + 7 =0 is the other.

x = - 7

< 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⭐