tolong di jawab buat besok

5a) 4x^2 - 36
= 4(x^2 - 9)
= 4( x + 3) (x - 3)
b) 4x^2 - 7x - 2
= (4x + 1)(x -2)
6a) 1/ (a+b) + 1/(a - b)
= (a - b) - (a+ b) / (a+ b)(a - b)
= -2b / (a^2 - b^2)
b) ( 6 + 3x+'2 )/(9x)
= (3x + 8) /(9x)
7a) 2(x+2)-3(x-1) /( x^2 +x -2)
= (- x +7) / (x^2 + x -2)
b) 3(x +4) -5(2x -3) /(x+4)(2x - 3)
= (-7x -3) /(2x^2 +5x -12)
= -(7x + 3) / ( 2x^2 + 5x -12)
8a) (x +2)(x-2) /(x-1)(x+3)
= (x^2 -4)/ (x^2 +2x -3)
b) (x +2)(x+3)/(x-1)(x-2)
= (x^2 + 5x +6) /(x^2 -3x + 2)