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2-5 Quizizz Complete Square Practice

Authored by Debra Schneider

Mathematics

10th - 12th Grade

CCSS covered

Used 16+ times

2-5 Quizizz Complete Square Practice
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10 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Find the value that completes the square and then rewrite as a perfect square.

a2 - 40a + ____

1600; (a - 20)2

-20; (a - 20)2

81; (a - 9)2

400; (a - 20)2

Answer explanation

Divide -40 by 2. Square it for the first answer. Second answer is (a plus first result).

Tags

CCSS.HSA-REI.B.4B

2.

FILL IN THE BLANK QUESTION

1 min • 1 pt

Find the value that completes the square.
x2 + 4x + ___

Answer explanation

Divide +4 by 2.

Tags

CCSS.HSA-REI.B.4B

3.

FILL IN THE BLANK QUESTION

30 sec • 1 pt

Rewrite as a perfect square.
 x2+4x+x^2+4x+_{ }  ____

Answer explanation

Answer is (x plus result)^2.

Tags

CCSS.HSA-REI.B.4B

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Solve the equation by completing the square.

A

B

C

D

Answer explanation

Subtract 20 from both sides.

Do +6/2. Then square it.

Add that to both sides.

Rewrite the left side as (x + (+6/2))^2

Take the square root of both sides.

Remember to use +- square root on right side.

Now, solve for x.

You should have two answers.

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

5.

FILL IN THE BLANK QUESTION

1 min • 1 pt

Solve. You might want to complete the square.

 x24x11=10x^2-4x-11=10  
Write just the answers without "x".

Answer explanation

Add 11 to both sides.
Do -4/2. Then square it.
Add that to both sides.
Rewrite the left side as (x + (-4/2))^2
Take the square root of both sides.
Remember to use +- square root on right side.
Now, solve for x.
You should have two answers.

Tags

CCSS.HSA-REI.B.4B

6.

FILL IN THE BLANK QUESTION

30 sec • 1 pt

Solve. You might want to complete the square.

 x2+14=15x^2+14=15  
Write just the answers without "x".

Answer explanation

Do 14/2. Then square it.
Add that to both sides.
Rewrite the left side as (x + (14/2))^2
Take the square root of both sides.
Remember to use +- square root on right side.
Now, solve for x.
You should have two answers.

Tags

CCSS.HSA-REI.B.4B

7.

FILL IN THE BLANK QUESTION

30 sec • 1 pt

Solve. You might want to complete the square.

 x2=21+8xx^2=-21+8x  
Write just the answers without "x".

Answer explanation

Subtract 8x from both sides.

Do -8/2. Then square it.

Add that to both sides.
Rewrite the left side as (x + __)^2
Take the square root of both sides.
Remember to use +- square root on right side.
Now, solve for x.
You should have two answers.

Did you take the square root of a negative number?

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

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