Решите уравнение. (2+5х)²-(3+5х)(5 х-3)=73​

(2+5х)²-(3+5х)(5 х-3)=73​

(2+5х)²-(5x+3)(5 х-3)=73​

4+20x+25x²-25x²-9-73=0

4+20x-9-73=0

20x-78=0

20x=78

x=78÷20

x=3,9

(2+5х)²-(3+5х)(5 х+3)=73

4+20х+25х²-15х+9+25х+15х=73

25х²+45х+13-73=0

25х²+45х-60=0 | :5

5х²+9х-12=0

Д=в²-4ас=81+240=321

Ну я хз