Check whether the value given in the brackets is a solution to the given equation or not:
(a) n + 5 = 19 (n = 1) (b) 7n + 5 = 19 (n = − 2)
(c) 7n + 5 = 19 (n = 2) (d) 4p − 3 = 13 (p = 1)
(e) 4p − 3 = 13 (p = − 4) (f) 4p − 3 = 13 (p = 0)
Find the roots of the following equations
(1) x(x − 3) = 0
(2) a(a + 5) = 0
(3) m2 − 4m = 0
(4) 3k2 + 6k = 0
(5) (y + 6) (y + 9) = 0
(6) (b − 3) (b − 5) = 0
(7) (2n + 1) (3n − 2) = 0
(8) (5z − 2) (7z + 3) = 0