# Quiz 4

Q- Solve for x:

- 3x^2 = -12
- (5x + 1)^2 = 4
- 3x^2 = 21x
- x^2 + 6x + 8 = 0
- 5x^2 – 5x – 100 = 0
- 2x^2 – 7x = 15
- 2x(x-1) -3(x+2) = -3

Q- Solve for x using the null factor law:

- wxyz = 0
- x(x+3) = 0
- -6(x-5)(3x+2) = 0

Q- What must be added to create a perfect square and write each equation in the form (x+p)^2 = k:

- x^2 – 2x = 4
- x^2 + 3x = -1

Q- Solve for x by completing the square. Leave your answer in the simplest radical form:

- x^2 -4x -2 = 0
- x^2 + 8x +5 = 0

Q- When a number is squared and then multiplied by 6, the result is one more than the original number. Find the number.

Q- Use Pythagoras theorem to find x:

Q- The rectangular field has perimeter 600m and area 21 600 m^2. Find the dimensions of the property.