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= 3x(x-3)-1(x+5)
= (3x-1) (x-5)
2. h(x)= ax+b, h(5)=16 dan h(4)= 11
h(5)= ax+b h(4) = axtb
16 = 5a+b 11 = 4a+b
5a+b=16
4a+b=11
-------- -
a= 5
4a+b= 11
4.5+b= 11
20+b= 11
b= 11-20= -9
h(-1)= ax+b
h(-1)= 5.-1 -9
h(-+)= -5-9= -14
* h(5)=16 => h(5)=a(5)+b=16
5a+b=16
* h(4)=11 => h(4)=a(4)+b=11
4a+b=11
5a+b=16
4a+b=11
= 5a - 4a = 5
= a = 5
4a+b=11 => 4(5)+b=11
20+b =11 => b = -9
Jadi, h(-1) = 5(-1)+(-9)
= -6 -9 = -15