Question

(6x+10)(6x-10)=15 +(3x-5)(12x+5)

Answer 1

te dejo la solución
$(6x+10)(6x-10)=15 +(3x-5)(12x+5) \\ 36 {x}^{2} - 60x + 60x - 100 = 15 + 36 {x}^{2} + 15x - 60x - 25 \\ 36 {x}^{2} - {36x}^{2} + 45x = - 10 + 100 \\ 45x = 90 \\ x = \frac{45}{90} \\ x = 2$