0=144t-16t^2
Let's solve in ℝ: 144t -16t2 = 0
You can factor: 144t -16t2 into: t·(144 -16t)
A product is zero if and only if one of its factors is zero: we solve each factor equal to 0
⇥Let's solve in ℝ: t = 0
⇥Solution obtained: t = 0
⇥Let's solve in ℝ: 144 -16t = 0
⇥ 16t = 144
⇥ⓘ Both sides are divided by 16
⇥ t = 14416
⇥The fraction: 14416 simplifies by the common factor: 16 into the new expression: 9
⇥Solution found: t = 9
▶Solution:   t = { 0, 9 }