Unit 7 Lesson 11-15

What is a perfect square?

• An expression that is multiplied by two

• An expression that is multiplied by itself

• An expression that is multiplied by one

• An expression that is multiplied by zero

If x squared minus 18x plus 81 equals 25, what are the possible values of x?

• x equals 10 and x equals 5

• x equals 7 and x equals 2

• x equals 14 and x equals 4

• x equals 9 and x equals 3

What is the first step in completing the square for the equation x squared minus 14x plus 10 equals negative 30?

• Multiply each side by 10

• Divide each side by 10

• Subtract 10 from each side

• Add 10 to each side

In the expression 16x squared plus 40x equals 11, what is the value of m if k is 4?

• m equals 5

• m equals 4

• m equals 3

• m equals 2

How can we express the solutions to the equation x plus 4 squared equals 11?

• x equals 4 plus or minus the square root of 11

• x equals negative 4 plus or minus the square root of 11

• x equals negative 4 plus or minus 11

• x equals 4 plus or minus 11