Question

t² + 1.5t - 45 = 0 please solve this i had given this questin 40 point​

Answer 1

Hi friend!!!

The equation can be written as t^2 + 3/2 t - 45 =0

Multiplying everything by 2, we get

2t^3 + 3 t - 90 = 0

This can be simplified as

2t^2 + 15t - 12 t - 90 = 0

t ( 2t + 15 ) - 6 ( 2t + 15 ) = 0

(t - 6)(2t + 15) = 0

t-6 = 0            2t + 15 = 0

t = 6                 t = -15/2 = -7.5

Hope it helps!!!!

Answer 2

Answer:

2t² + 3t - 90 =0

=> 2t² - 12t + 15t - 90 = 0

=> (t-6)(2t+15) = 0

=> t = 6, -7.5