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2.5x pangkat 2-14x+3
2. -5x(x-2)- (-4(2x+3))=-5x2+10x-(-8x-12)= 5x2+10x+8x+12=5x2+18x+12
3. a(3a+4q)=3a2+4aq
4. -2p(7p²+4q)=-14p3-8pq
5. (2y-5)(2y+3)=4y2+6y-10y-15=4y2-4y-15
6. (4x-3)(5x-2)=20x2-8x-15x+6=20x2-23x+6
7. 4x²-8+4=4x2-4=4(2x+2)(2x-2)
8. a²-8a+16=(a-4)(a-4)
9. 9x²+6x+1=?
10. a²-9=1(a+3)(a-3)
11. 4a²-25=(2a+5)(2a-5)
12. x²+16x+64=(x+8)(x+8)