Question

化简√18X²y(X小于0,y大于0) 3√12－6√3＋√1

Answer 1

√18X²y=√2×3^2X²y=/3X/√2y=-3x√2y

3√12－6√3＋√1

= 3√2^2×3－6√3＋√1

=3×2√3－6√3＋1

=1

(√12－√3)×√3

=(√12)×√3-√3×√3

=√36-3

=√6^2-3

=6-3

=3

(√3＋2)(√3－2)

=(√3）^2)－2^2

=3-4

=-1