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= x^2 +4x +2x +8
=x^2 +6x +8
=(x+2) (x+4)
x= -2 atau x= -4
2. (2p +5) (2p-5)
=4p^2 -10p +10p -25
=4p^2 -25
3. (4+ 2m) (m -8)
=4m - 32 +2m^2 -16m
2m^2 -12m -32
2m(m -8) +4 (m-8)
(2m+4) (m- 8)
m= -2 atau m=8
4. (10x -3) (2x -1)
20x^2 -10x -6x +3
20x^2 -16x +3
5. (7-x) (7x-1)
49-7 -7x^2 +x
-7x^2 +49x +x-7
-7x^2 +50x -7
semoga membantu yaaa!!! sorry ya yg gak memuaskan! ;)