Which of the following statements is true?

A. True.

B. True.

C. false

D. True.

Step-by-step explanation:

A. True.

we can find the value of 'x of any quadratic equation in completing the square method.

B. True

The completing square method gives two distinct solutions

C. False.

We can use completing the square method if there is any constant term

example. x² + 4x =0

add  4 on both sides

x² + 4x + 4 = 4

(x +2)² = 2²

x + 1 = ±2

x = +2-1 =1 or x = -2-1 = -3

D.True.

If we know the value of coefficient of x then only we can use completing square method

1.4

2.3

step-by-step explanation:

the formula for the constant of variation is

y= kx

divide each side by x

y/x =kx/x

y/x =k

we know a and y

1.   y/x = k

4/1 =4

check the other values to make sure they are the same

8/2 = 4   12/3 =4   and 16/4 =4  

the constant of variation is 4

2.   y/x = k

3/1 =3

check the other values to make sure they are the same

6/2 = 3   9/3 =3   and 12/4 =3  

the constant of variation is 3