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1.) (8x²-5x-11) + (20+5x-9x²) = -x²+9 (A.)
2.) (3p²-7) - (p²-3p-2) = 2p²+3p-5 (D.)
3.) (2p-p²) - (p²-p+3) = -2p²+3p-3 = 2p²-3p+3 (B.)
4.) 3(2x²+x-2) - 5(x²+3) = (6x²+3x-6) - (5x²+15) = x²+3x-21 (C.)
5.) 3pq(2p-q) = 6p²q - 3pq² (C.)
6.) -2x(2y-x) = -4xy + 2x² = 2x²-4xy (D.)
8.) (2x-3)(3x+4) = 6x²-x-12, masukkan nilai a,b dan c, a+b+c=-7 (C.)
Sisanya dikerjakan sendiri ya, tinggal liat dari 7 soal diatas. Jangan males buat belajar sendiri juga ^^
Semoga membantu