Question

(2a - 3) square - 2(2a - 3) (a - 1) + (a - 1) square​

Answer 1

$(2a - 3) = x \\ (a - 1) = y$
${x}^{2} -2 xy + {y}^{2} \\ {(x + y)}^{2} \\ {(2a - 3 + a - 1)}^{2} \\ {(3a - 4)}^{2}$