Question

як спростити вираз (2x-1)(x+3)-(x+1)(2x-4)=22​

Answer 1

Ответ:

$(2x - 1)(x + 3) - (x + 1)(2x - 4) = 22 \\ 2x {}^{2} + 6x - x - 3 - 2x {}^{2} + 4x - 2x + 4 = 22 \\ 6x - x - 3 + 4x - 2x + 4 = 22 \\ 7x + 1 = 22 \\ 7x = 22 - 1 \\ 7x = 21 \\ x = 21 \div 7 \\ x = 3$