tolong jawab ya no 2,3,4,5

4. A. variabel = x
kofisien = 9
suku = 9x

B. variabel = x2, y
konstanta= 2
koefisien= 3, 6
suku = 3x2, 6y, 2

C. variabel ( s2, a, a3, t4)
konstanta ( -7)
koefisien ( 2, 3, 4,5)
suku (2s2, 3a, 4a3, 5t4, -7)

5. 5x+2y-10x+14y-12+12x2-3x+2
= 5x-10x+2y+14y-12+2-10x-3x+12x2
=-5x+16y-10-13x+12x2