Tolong di jawab yang c dan d yaaaaaa

jawab
a. (40 x²y²)/(45 x⁴ y)= (8 y)/(9x²)

b. (16x² -1)/ (12 x² - 5x + 20 = 
= (4x +1)(4x -1)/ (4x +1)(3x - 2)
= (4x -1)/(3x -2)

c. (8x² -8). /(5x² + x - 6) = 
= 8(x -1)(x+1)/ (x - 1)(5x +6)
= 8(x+1) / (5x +6)

d. (6x² + 13x - 5)/(1- 9x²)
= (2x + 5)(3x -1)  / -(3x - 1)(3x + 1)
= (2x + 5)./ -(3x+1)
= - (2x + 5)/(3x +1)