Bantuin jawab no 35 doang kak :)

Bantuin jawab no 35 doang kak :)

Jawaban:

$2 {t}^{2} - 5t - 150 = 0$

b. a = 15, t = 10

Penjelasan dengan langkah-langkah:

a = 2t – 5

$l = frac{1}{2} at \ 75 = frac{1}{2} (2t - 5)t \ 75 = frac{1}{2} (2 {t}^{2} - 5t) \ 2 {t}^{2} - 5t = 150 \ 2 {t}^{2} - 5t - 150 = 0 \ 2 {t}^{2} - 20 t+ 15t - 150 = 0 \ 2t(t - 10) + 15(t - 10) = 0 \ (2t + 15)(t - 10) = 0 \ \ 2t + 15 = 0 : = > : t = - frac{15}{2} \ tidak : memenuhi \ \ t - 10 = 0 : = > : t = 10 \ a = 2 times 10 - 5 = 15$