What is the focus of the parabola given by the equation y = x2 − 2x − 3? (4,-15/4) (1,4) (1,-4) (1,15/4) (1,-15/4)

the focus of the parabola is:

Step-by-step explanation:

we will convert this given equation of the parabola into the general parabola equation of the type

on converting the given equation of the type into general equation of parabola we get that

clearly here vertex=(h,k)=(1,-4) and

so focus=(h,k+a)

hence the given parabola has focus:

step-by-step explanation:

d. 8

step-by-step explanation:

the given radical expression is:

we can rewrite this as:

we express as square numbers to get;

the exponents will now cancel out to give.

the correct answer is d