(2x+5)(x-6)+2(3x+2)(3x-2)=5(2x+1)²

Question

(2x+5)(x-6)+2(3x+2)(3x-2)=5(2x+1)²

Answer 1

2x^2 - 12x + 5x - 30 + 2(9x^2 - 4) = 5(4x^2 + 4x + 1)
2x^2 - 7x - 30 + 18x^2 - 8 = 20x^2 + 20x + 5
20x^2 - 7x - 38 = 20x^2 + 20x + 5
- 7x - 38 = 20x + 5
- 7x - 20x = 38 + 5
- 27x = 43
27x = - 43
x = - 43/27 = - 1 целая  16/27