Question

Determine by substitution,if:
(a) 2 is a root of 5x _ 10 =0.
(b) 4 is a root of 2x _ 3=5.​

Answer 1

a) When x = 2

( 5 x 2 ) - 10 = 10 - 10 = 0

b) When x = 4

( 5 x 4 ) - 3 = 8 - 3 = 5

Hence justified