Question

(3x+1)(3x-2)-(3x-1)²=11

Answer 1

$(3 \times + 1)(3 \times - 2) - (3 \times - 1) {?}^{2} = 11 \\ \\ 9 \times - 6 \times + 3 \times - 1 - 3 \times - 1 = 11 \\ 3 \times = 11 \\ \times = 11 \div 3$