# Quadratic Equations and Simultaneous Equations MCQs - Math Test 7

MCQ. Solve equation 4x^{2} + 36x + 81

- x = 9⁄2, x = 9⁄2.
- x = -9⁄2, x = 9⁄2.
- x = -9⁄2, x = -9⁄2.
- None of above.

C

MCQ. Solve equation x^{2} + 6x - 7 = 0

- x = -6, x = -1.
- x = -6, x = 1.
- x = 6, x = -1.
- x = 6, x = 1.

D

MCQ. Solve equation x^{2} + 3x

- x = -3.
- x = 0, x = -3.
- x = 3.
- x = 0, x = 3.

B

MCQ. Solve equation x^{2} - 3x

- x = -3.
- x = 0, x = -3.
- x = 3.
- x = 0, x = 3.

D

MCQ. Find by using formula roots for following equation: ax^{2} + bx + c

- (-b±?(b
^{2}- 4ac)) ⁄ 2a. - (b ± ?(b
^{2}- 4ac)) ⁄ 2a. - (-b ± ?(b
^{2}+ 4ac)) ⁄ 2a. - (-b ± ?(b
^{2}- 4c)) ⁄ 2a.

A