計算:【(3√2)-(2√5)】的立方×【(3√2)+(2√5)】的立方

計算:【(3√2)-(2√5)】的立方×【(3√2)+(2√5)】的立方

【(3√2)-(2√5)】³;×【(3√2)+(2√5)】³;
={[(3√2)-(2√5)][(3√2)+(2√5)]}³;
=[(3√2)²;-(2√5)²;]³;
=(18-20)³;
=(-2)³;
=-8