Quadratic Expressions and Equations

43.
(a) Solve the equation x 2 − 3 x − 18 = 0 .
x = ......................... or x = ......................... [3]
Paper 3
44.
Factorise: x 2 − 3 x − 28
......................... [2]
Paper 3
45.
Solve x 2 − 9 x + 14 = 0 .
x = ......................... or x = ......................... [2]
Paper 3
46.
Solve x 2 − 3 x − 4 = 0 .
x = ......................... or x = ......................... [2]
Paper 3
47.
Solve the following quadratic equation by factorisation:

(a) t 2 − 6 t − 27 = 0
t = ......................... or t = ......................... [3]
(b) y 2 + 18 y + 45 = 0
y = ......................... or y = ......................... [3]
(c) x 2 = 14 x − 49
x = ......................... or x = ......................... [3]
(d) y 2 = − 12 y
y = ......................... or y = ......................... [2]
Paper 3