Solving Quadratic Equations: Completing the Square

Question 1

What number would you add to both sides of x2 + 7x = 4 to complete the square?

Revolt · Accepted Answer

D:

Question 2

Solve x2 + 12x = –20 by completing the square.

Revolt · Accepted Answer

Add to both sides of the equation. The value of in this equation is .: 36; Write the left side of the equation as a binomial squared. The left side of the equation becomes ()2.: x + 6; Isolate the variable: x =: –10 or –2

Question 3

Solve x2 + 12x = –20 by completing the square.

Revolt · Accepted Answer

C: ✔ 36

Question 4

Solve x2 + 8x = 33 by completing the square. Which is the solution set of the equation?

Revolt · Accepted Answer

A: {–11, 3}

Question 5

Which describes the solutions of the equation?

Revolt · Accepted Answer

A: Since 7 and 11 are both rational, the sum and difference are rational.

Question 6

What is the solution set of x2 – 10 = 30x?

Revolt · Accepted Answer

C: {15 – , 15 + }

Question 7

What are the solutions of x2 = 8 – 5x?

Revolt · Accepted Answer

B:

Question 8

x + 3✔ x + 6x + 10x + 12

Revolt · Accepted Answer

B: ✔ x + 6

Question 9

–4 or 4–6 or 62 or 10✔ –10 or –2

Revolt · Accepted Answer

D: ✔ –10 or –2

Question 10

Question 10

Revolt · Accepted Answer

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Solving Quadratic Equations: Completing the Square Answers

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