(2t-3) * (5t+2) + (3t-1) * (4t+2) = 10t² - 5
10t² - 15t + 4t - 6 + (12t² - 4t + 6t - 2)=10t²-5
22t²-9t-8=10t²-5
12t²-9t-8+5=0
12t²-9t-3=0
4t²-3t-1=0
D=9-4*4*(-1)=9+8=17
t1=3-√17\8
t2=3+√17\8
