a. 3(-2x-4y)² b. -6x²+17x-5 c. x+3/x-2 + x-2/x+3 d. 3/x²+x-2 - 2/x²+3x+3

a. 3[(-2x-4y)(-2x-4y)]
= 3[4x²+8xy+8xy+16y²]
=3[4x²+16xy+16y²]
=12x²+48xy+ 48y

b. (3x+1)(-2x-5) faktorisasi aja

c. dikalikan aja penyebutnya
x+3/x-2 + x-2/x+3
= (x+3)(x+3)/(x-2)(x+3) +(x-2) (x-2) /(x+3)(x+2)
= x²+9x+9/x²+x-6 + x²-4x+4/x²+x-6
= 2x²+5x+ 13/x²+x-6

d. 3/x²+x-2 - 2/x²+3x+3
= 3/(x-1)(x+2) - 2/(x+3)(x+1)
= 3(x+3)(x+1)/(x-1)(x+2)(x+3)(x+1) - 2(x-1)(x+2)/(x-1)(x+2)(x+3)(x+1)
=3(x²+3x+3) /(x²+x-2)(x²+3x+3) - 2(x²+x-2)/(x²+x-2)(x²+3x+3)
=3x²+9x+9/(x²+x-2)(x²+3x+3) - 2x²-2x+4/(x²+x-2)(x²+3x+3)
= x²+7x+13/(x²+x-2)(x²+3x+3)