TOLONG BANTU DONG KA SOALNYA DI BAWA BESOK HARI SABTU TERUS DI KUMPULIN

1. a.) 4x-2x = 2x
b.) 7a+2-5a-3
= 7a-5a+2-3 = 2a-1
c.) 5x-12x+2
= -7x+2

3. a.) 4/x+3 – 5/x-1
= 4(x-1) – 5(x+3) / (x+3)(x-1)
= 4x – 4 – 5x -15 / (x+3)(x-1)
= 4x – 5x – 4 – 15 / x² – x + 3x -3
= -x – 19 / x² + 2x – 3
b.) 1/k-4 – 2/k+3
= 1(k+3) – 2(k-4) / (k-4)(k+3)
= k + 3 – 2k + 8 / (k-4)(k+3)
= k – 2k + 3 + 8 / k² + 3k – 4k – 12
= -k + 12 / k² – k – 12