Sederhanakn bentuk pejumlahan berikut! A. 1/a + 3/ab B. 2/x+2 + 3/x-4

A. 1/a + 3/ab
Kpk = ab

1/a + 3/ab = b/ab + 3/ab
= (3+b)/ab


B. 2/x+2 + 3/x-4
Kpk ( x+2) (x-4)
2 (x-4) / ( x+2) (x-4) + 3 (x+2) / ( x+2) (x-4)
=((2 (x-4) +3 (x+2)) /( ( x+2) (x-4) )
= (2x-8+3x+6) /( x+2) (x-4)
=(5x-2) / ( x+2) (x-4)