Question

решите уравнение (2t-2)(5t+3)-(3t-1)(3t+2)=-4

Answer 1

(2t-2)*(5t+3)-(3t-1)*(3t+2)=-4

10t^2+6t-10t-6-(9t^2+6t-3t-2)=-4

10t^2+6t-10t-6-(9t^2+3t-2)=-4

10t^2+6t-10t-6-9t^2-3t+2=-4

t^2-7t-4=-4

t^2-7t=0

t(t-7)=0

t=0 t-7=0

t=7