Đáp án:
Giải thích các bước giải:
$c){\left( {2x + 3} \right)^3} + {\left( {x - 1} \right)^2}$
$ = {\left( {2x} \right)^3} + 3.{\left( {2x} \right)^2}.3 + 3.2x{.3^2} + {3^3} + {x^2} - 2x + 1$
$ = 8{x^3} + 36{x^2} + 54x + 27 + {x^2} - 2x + 1$
$= 8{x^3} + 37{x^2} + 52x + 28$
$d){\left( {x - 2021} \right)^2} - 2\left( {x - 2022} \right)\left( {x - 2021} \right) + {\left( {x - 2022} \right)^2}$
$= {\left( {x - 2021 - \left( {x - 2022} \right)} \right)^2}$
$ = {\left( {x - 2021 - x + 2022} \right)^2}$ = 1
