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-4p² - 13p + 11
= 2p( 2p - 4) -4(2p - 4)
= 2p^2 - 8p - 8p + 16
--------------------------:2
p^2 - 4p - 4p + 8
= p^2 - 8p + 8
Jadi
3p - 5 - (p^2 - 8p + 8)
= 3p - 5 - p^2 + 8p - 8
= -p^2 + 3p + 8p - 5 - 8
= -p^2 + 11p - 12
(-p - 1)(p + 12)=0
-p - 1= 0 p+ 12= 0
-p=1 p= -12
p= -1