5t2 -10t = 0
(5t)(t - 2) = 0
Either t5 = 0 or t - 2 = 0 which means that t = 0 or t = 2.
x2-3x -10=0
x2-5x -2x-10=0
x(x-5) -2(x-5)=0
(x-5)(x-2)=0
Therefore, either (x-5)=0 or (x-2)=0 and in this case x = 5 or x = 2.
(5t)(t - 2) = 0
Either t5 = 0 or t - 2 = 0 which means that t = 0 or t = 2.
x2-3x -10=0
x2-5x -2x-10=0
x(x-5) -2(x-5)=0
(x-5)(x-2)=0
Therefore, either (x-5)=0 or (x-2)=0 and in this case x = 5 or x = 2.