No, we have to divide the whole equation by that number.
2.
x2+6x−7=0
Step 2: Move the constant to the other side of the equation. What does the result look like:
a)
x2+6x+=7
b)
x2+6x=−7
c)
x2+6x−7=7
d)
x2=−6x+7
3.
x2+6x=7
Step 3: Find the value that would complete the perfect square trinomial
Hint: (2b)2
a)
+9
b)
-9
c)
+36
d)
6
4.
x2+6x+=7
Step 4: Add (2b)2 to both sides of the equation. What would that look like?
a)
x2+6x+9=16
b)
x2+6x+9=7
c)
x2+6x+9=−2
d)
x2+6x−9=−2
5.
x2+6x+9=16
Step 5: Factor the perfect square trinomial. Type in the factors as the binomial squared.
a)
(x+3)2
b)
(x+6)2
c)
(x+3)(x+6)
d)
(x+4)2
6.
(x+3)2=16
Step 6: Part a: Take the square root of both sides. What does that look like:
a)
x+3=±4
b)
x+3=4
c)
x+3=±16
d)
x+3=16
7.
x+3=±4
Step 6 part b: Split that equation into two equations, one for the positive number and one for the negative and solve them both. Select your answers below.
a)
x=1
b)
x= -7
c)
x = -1
d)
x = 7
8.
What do you do to the b value to correctly complete the square?
a)
b)
c)
d)
9.
When do you use the plus or minus symbol?
a)
b)
c)
d)
10.
Complete the square for
x2 + 12x + ____
a)
x2 + 12x + 144
b)
x2 + 12x + 36
c)
x2 + 12x - 36
d)
x2 + +12x - 144
11.
Answer the question.
a)
b)
c)
d)
12.
What is the first step in solving this equation
a)
b)
c)
d)
13.
When factoring x2 -4x+4=0. What goes in the blank?
(x-_____)2=0
a)
8
b)
2
c)
4
d)
20
14.
Solve the equation by completing the square.
x2-8x-9=0
a)
{-3,-13}
b)
{3,13}
c)
{-1,9}
d)
{1,9}
15.
Solve the quadratic equations by completing the square.
5x2+50x+80=0
a)
{-8,-2}
b)
{8,2}
c)
{-8,2}
d)
{8,-2}
16.
Given the perfect square trinomial, identify the equivalent expression
x2-18x+81
a)
(x-18)2
b)
(x-9)2
c)
(x+81)2
d)
(x+9)2
17.
What is one of the solutions to this equation?
(x - 3)2 = 49
a)
7
b)
-7
c)
-4
d)
4
18.
Solve by completing the square. x2 +12x = 5
a)
X = 6 + √41 or 6 − √41
b)
X= 35 or 47
c)
X = −6 + √41 or −6 − √41
d)
X = √35 or √47
19.
What is the correct order for solving quadratic equations by completing the square.