Question

$4 - a {}^{2} =$
$8 - a { }^{3} =$
$27d {}^{3} - 1 =$
$8d {}^{3} - 8c {}^{3} =$
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Answer 1

4-а²=2²-а²=(2-а)(2+a) ;

8-a³=2³-a³=(2-a)(2²+2a+a²)=(2-a)(4+2a+a²) ;

27d³-1 = это кубическая функция ;

8d³-8c³=8(d³-c³)=8(d-c)(d²+cd+c²) .