Question

please help i tried answering these questions already and got them wrong !:(

Answer 1

What are the questions?

Answer 2

What number needs to be added to complete the square of x2 – 3x = 7?
Select one:
a. 9/4
b. 3/2
c.-3/2
d.-9/4

Answer 3

What is the vertex of y = x2 – 2x = 7?
Select one:
a. (1, –8)
b. (–1, 8)
c. (–1, –8)
d. (1, 8)

Answer 4

$$
x^2-3x=7
$$
To complete the square look at this
$$
x^2+bx=c\\
(x+\frac{b}{2})^2=c+\frac{b^2}{4}
$$
So in your equation what is b? Then you'll know what to add to complete the square: \(\large \frac{b^2}{4}\).

Does this make sense?

Answer 5

mmm im gunna be completly honest and say no , i know i must seem so dumb but i'm really really bad at math and have no clue what im doing ..