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a. p(-2)=2(-2)-2=-4-2=-6
p(2)=2(2)-2=4-2=2
b.p(x)=24
maka p(x)=2x-2=24
2x=24+2
x=26/2=13
8.f(x)=-2x-17
a. f(p)=1
f(p)=-2x-17=1
-2x=1+17
x=18/-2=-9
b. p^+2p-12=-9^2+2(-9)-12=81+(-18)-12
=63-12
=51
yang duanya coba pake cara eliminasi dan substitusi
-5a + b = -1
pakai eliminasi jadi a =1 terus disubstusikan jadinya b =4
no 9 bag bnya juga sama