sederhanakan bentuk bentuk aljabar berikut!pakai cara!yang benar bakal dijadiin jawaban terbaik! a.(3x²+2x-1)+(x²-5x+6) b.2(x+2y-xy)+5(2x-3y+5xy) c.(y²-3)-(4y²+

a. (3x kuadrat + 2x - 1) + (x kuadrat - 5x + 6)
= 3x kuadrat + 2x - 1 + x kuadrat - 5x + 6
= 3x kuadrat + x kuadrat + 2x - 5x - 1 + 6
= 4x kuadrat - 3x + 5

b. 2(x+2y-xy)+5(2x-3y+5xy)
= 2x + 4y - 2xy + 10x - 15y + 25xy
= 2x + 10x + 4y - 15y - 2xy + 25xy
= 12x - 11y + 23xy

c. (y kuadrat - 3)-(4y kuadrat + 5y + 6)
= y kuadrat - 3 - 4y kuadrat - 5y - 6
= y kuadrat - 4y kuadrat - 3 - 6 - 5y
= - 3y kuadrat - 9 - 5y

d. (5a - 6 + ab)-(a + 2ab - 1)
= 5a - 6 + ab - a - 2ab + 1
= 5a - a - 6 + 1 + ab - 2ab
= 4a - 5 - ab