Module 14 Lesson 1 Completing the Square CYK Answer Key
1. Write x2 + 4x = 5 in vertex form. Write your answer in the form a(x-h)^2+k=0 with no
spaces.
(x2 + 4x + 4) - 5 – 4 = 0
(x+2)^2-9=0
2. Write x2 - 6x +8 = 0 in vertex form. Write your answer in the form a(x-h)^2+k=0 with no
spaces.
(x2 - 6x +9)+8-9 = 0
(x-3)^2-1=0
3. Write x2 + 10x - 15 = 0 in vertex form. Write your answer in the form a(x-h)^2+k=0 with no spaces.
(x2 + 10x+25)-15-25=0
(x+5)^2-40
4. Write 3x2 - 6x +7 = 0 in vertex form. Write your answer in the form a(x-h)^2+k=0 with no spaces.
3(x2 - 2x +1)+7-3(1)=0
3(x-1)^2+4=0
5. Write 4x2 + 24x = 11 in vertex form. Write your answer in the form a(x-h)^2+k=0 with no spaces.
4(x2 + 6x+9) -11-4(9) = 0
4(x+3)^2-47