Question

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

Answer 1

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

Answer 2

(6x+10)(6x-10)=15+(3x-5)(12x+5)
36x²-60x+60x-100=15+36x²+15x-60x-25
36x²-100=36x²-45x-10
36x²-36x²+45x=-10+100
45x=90
x=90/45
x=2