Question

60t² - 25t - 70 = 0

Answer 1

60t² - 25t - 70 = 0 (:5)
12t² - 5t - 14 = 0
a = 12; b = - 5; c = - 14

Δ = b² - 4ac
Δ = 25 - 4.12.(-14)
Δ = 25 + 672
Δ = 697

x = - b +/- √Δ
         2a

x' = 5 +√697
         24

x" = 5 - √697
       24