Question

Tolong jawab nomer 2, 4, 6

Answer 1

Jawaban sudah tertera di gambar

Answer 2

No 2
a. f(x)=-4x+8
b.
f(-3)= -4(-3)+8 = 12+8 =20
f(0)=0+8=8
f(11)=-4(11)+8=-44+8=-36
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no 3
g(x)= 10-3x
g(2)=10-3(2)=10-6=4
g(-4)=10-3(-4)=10+12=22
g(2)+g(-4)= 4+22=26
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g(5)=10-3(5)=10-15=-5
g(-2)=10-3(-2)=10+6=16
g(5)-g(-2)=-5-16 =-21
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4.
f(x)=x²+3x
f(5)=5²+3(5)=25+15=40
f(a+4)=(a+4)²+3(a+4)=a²+8a+16+3a+12 =a²+11a+28
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6.
g(x)=3x²-16
g(6)= 3(6)²-16= 216-16=200
g(-5)=3(-5)²-16=75-16=59
g(a)=32
3x²-16=32
3x²=32+16
3x²=48
x²=16
x=±4