Which function is a quadratic function?
y – 3x2 = 3(x2 + 5) + 1
y2 – 7x = 2(x2 + 6) + 7
y – 2x2 = 6(x3 + 5) – 4
y – 5x = 4(x + 5) + 9

Option A -    

Step-by-step explanation:

To find : Which function is a quadratic function?

Solution :

A quadratic equation is in the form of

A)  

Solving equation,

On comparing the equation,

We have a=6,b=0 and c=16

So, This is a quadratic equation.

B)

We have two quadratic factor so it is not a quadratic equation.

C)

We have cubic factor so it is not a quadratic equation.

D)

We have linear equation so it is not a quadratic equation.

Therefore, Option A is correct.

< 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⭐