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= 20a-16b -10a-2b
= (20-10)a + (-16-2)b
= 10a-18b
2. -4(5a-3b) + 2(4a-5b)
=-20a+12b + 8a-10b
= (-20+8)a + (12-10)b
= -12a + 2b
3. 5p-4pq+p+6pq+q
= (5+1)p + (-4+6)pq +q
= 6p + 2pq +q
yg no 4 ama 5 itu pengurangan /penjumplahan?
= 20a-10a-16b-2b
= 10a-18b
2. -4(6a-3b)+2(4a-5b) = -24a+12b+8a-10b
= -24a+8a+12b-10b
= -16a+2b
3. 5p-4pq+p+6pq+q = -4pq+6pq+5p+p+q
= 2pq+6p+q
= 2p(q+3)+q
4. 3(3p+2q-5r)+(-11p-13q+r) = 9p+6q-15r-11p-13q+r
= 9p-11p+6q-13q-15r+r
= -2p-7q-14r
5. 6(p²+1)-5(p²-2) = 6p²+6-5p²+10
= p²+16