El profesor se sorprenderá mucho al ver tu solución correcta😉
(2*x + 5)*(3*x - 7) + (2*x - 1)*(2*x + 1) = (5*x + 3)*(2*x - 5)
(2*x+5)*(3*x-7)+(2*x-1)*(2*x+1) = (5*x+3)*(2*x-5)
- 35 + x + 6*x^2 + (2*x - 1)*(2*x + 1) = (5*x+3)*(2*x-5)
- 35 + x + 6*x^2 + - 1 + 4*x^2 = (5*x+3)*(2*x-5)
(2*x+5)*(3*x-7)+(2*x-1)*(2*x+1) = -15 - 19*x + 10*x^2
-21 + 20*x = 0
x = 21 / (20)
suma
21 -- 20
=
21 -- 20
producto
21 -- 20
=
21 -- 20
21/20