no 1-4 ya pake cara dan hasil

a. 6x³-4x²-2x³+5x²
= (6x³-2x³)-(4x²+5x²)
= 4x³-x²
= x²(4x-1)

b. 2pq+3q-7pq+2p
= (2pq-7pq)+3q+2p
= -5pq+2p+3q

c. 5(x²-3)+3(x²+2)
= 5x²-15+3x²+6
= 8x²-9

d. 4(x²-3)+3(x²+2)
= 4x²-12+3x²+6
= 7x²-6