tolong bantuin ya secepat mungkin....

4. =(2x3)'5/3'4x2'3
=2'5x3'5 /3'4x2'3
=2'2 x 3
=4x3
=12

5. (2-√3)'2 x (2+√3)
=(2+√3)'2
=4-4√3 +3
=7-4√3