Question

-65 = 12×t-0.5×10×t×t​

Answer 1

Answer:

-2.6 or 5 ans

Step-by-step explanation:

I can't very long process

Answer 2

Answer:

-65 = 12t - (0.5×10×t×t)

-65 = 12t - 5t²

5t²-12t -65 =0

5t²+13t - 25t -65 =0

t(5t + 13) - 5( 5t +13) =0

(t - 5) (5t +13) = 0

t -5 =0 , 5t +13 =0

t = 5 , 5t = -13

t = -13/5

t = 2.6