Nesesito ayuda x favor?

Respuesta : a) t₁ = 20 s, t₂ = 4 s

b) t = 24.

01 s

Explicación paso a paso : L = - 16t² + 384t + 4a) L = 12841284 = - 16t² + 384t + 40 = - 16t² + 384t + 4 - 12840 = - 16t² + 384t - 12800 = - 16(t² - 24t + 80)0 = t² - 24t + 80t² - 24t + 80 = 0t - 20 - - - - - - - > - 20t t - 4 - - - - - - - > - 4t - 24t(t - 20)(t - 4) = 0t - 20 = 0t₁ = 20 st - 4 = 0t₂ = 4 sb) L = 00 = - 16t² + 384t + 40 = - 4(4t² - 96t - 1)0 = 4t² - 96t - 14t² - 96t - 1 = 0t₁ = [ - ( - 96) + √(( - 96)² - 4(4)( - 1))] / (2(4))t₁ = [96 + √(9216 + 16)] / 8t₁ = [96 + √9232] / 8t₁ = [96 + 96.

0833] / 8t₁ = [96 + 96.

08] / 8t₁ = 192.

08 / 8t₁ = 24.

01 s, si t₂ = [ - ( - 96) - √(( - 96)² - 4(4)( - 1))] / (2(4))t₂ = [96 - √(9216 + 16)] / 8t₂ = [96 - √9232] / 8t₂ = [96 - 96.

0833] / 8t₂ = [96 - 96.

08] / 8t₂ = - 0.

08 / 8t₂ = - 0.

01 s, no.