nomor 23 24 25 tolong yah....

23.
2sin120 - cos210 + 3sin60
= (2 × ½√3) - (-½√3) + (3 × ½√3)
= √3 + ½√3 + 3/2√3
= √3 + 2√3
= 3√3

24.
(3x² - 10x + 3)/(2x² - 3x - 9)
= ((x - 3)(3x - 1))/((x - 3)(2x + 3))
= (3x - 1)/(2x + 3)
= (3 × 3 - 1)/(2 × 3 + 3)
= (9 - 1)/(6 + 3)
= 8/9

25.
(2 - √(x + 1))/(x - 3)
= (2 - √(x + 1))/(x - 3) × (2 + √(x + 1))/(2 + √(x + 1))
= (4 - (x + 1))/((x - 3)(2 + √(x + 1))
= (3 - x)/((x - 3)(2 + √(x + 1))
= -(x - 3)/((x - 3)(2 + √(x + 1))
= -1/(2 + √(x + 1))
= -1/(2 + √(3 + 1))
= -1/(2 + √4)
= -1/(2 + 2)
= -¼