4/18 Classwork

What do you do to the b value to correctly complete the square?

• square it
• divide it by 2 and square the result
• divide it by 2 and take the square root of the result
• divide it by 2 only

What should be added to both sides of the following equation to complete the square?
x² - 16x = 5

hint: x² - 16x + c = 5 + c

find c by using calculator c = (b/2)^2

Factor the perfect square trinomial x² - 14x + 49 = (x - __)²

hint: find b --> b/2

What is my next step for solving the equation below

(x - 1)² = 4

hint: you may have multiple correct answers

• x - 1 = 2

• x - 1 = -2

• x - 1 = 4

• x - 1 = -4

If the discriminant is 1, then the solution will be

• one real solution

• two real solutions

• two complex solutions

• all real numbers

If the discriminant is -25, then the solution will be

• one real solution

• two real solutions

• two imaginary solutions

• all real numbers

1 The discriminant is

• aX² + bX + c

• b - 4ac

• b² - 4ac

• b² + 4ac

Complete the square for

x² + 12x + ____

(find the missing number in the blank)

• x² + 12x + 144

• x² + 12x + 36

• x² + 12x - 36

• x² + +12x - 144