Question

решите уравнение  (t во второй степени+8t-9)-(t во второй степени-11t+10)=18t-20   плизз решите

 

Answer 1

(t²+8t-9)-(t²-11t+10)=18t-20

t²+8t-9-t²+11t-10=18t-20

19t-19=18t-20

19t-18t=19-20

t=-1

Answer 2

1)t^2  + 8t - 9 -t^2 + 11t - 10=18t-20

2)19t-19 = 18t -20

3)19t-18t= -20 +19

4)1t= -1

5)t= -1/1 = -1