Tolong Di Jawab Pakai Cara....

No.23
4x² + 6xy + 4y² - (-2x² + 4xy - 3y²)
= 4x² + 2x² + 6xy - 4xy + 4y² + 3y²
= 6x² + 2xy + 7y²

No. 24
(2x - 3)(x + 5)
= 2x² + 10x - 3x - 15
= 2x² + 7x - 15

No.25
[ (3ab) / (2c) ] × [ (4ac) / (9b²) ]
= (12a²bc) / (18b²c)
= (12a²) / (18b)
= 2a² / 3b

No.26
(2x - 3)² - (-12x + 7)
= (4x² - 12x + 9) + 12x - 7
= 4x² + 2