Question 3 (1 point) 4x? - 1 and 1 – 4x2 are both examples of a difference of squares.
True
False
Question 4 (1 point)
The trinomial x2 - 10x + 21 when factored equals (x + 7)(x-3).
Lfrue
False

2nd one in the first row is correct

-4

step-by-step explanation:

do 6-10=

if u need it to be negative.

center (1,3) with radius 6

step-by-step explanation:

we must complete the square to find the center and radius of the circle.

first make sure the x and y squared terms have 1 as their coefficients. we also make sure x and y terms together.

we now create space between the x and y terms with parenthesis.

we complete the square by taking the middle terms -2x and the -6y - divide each and square them.

we add the squares to both sides.

simplify.

and write the quadratics in factored form.

the center is (h,k) or (1,3). the radius is the square root of 36 which is 6.