Question

Diketahui suatu fungsi f(x) = (3+b)x + 5. jika f(8) = -19 maka tentukanlah nilai b

Answer 1

F(x)=(3+b)x+5

f(8)=(3+b)(8) +5
-19=8b+24+5
-19=8b+29
-8b=29+19
b=48/-8
b= -6

Answer 2

F(x)=(3+b)x+5
3x+bx+5
f(8)=3(8)+8b+5=-19
f(8) = 24+8b+5= -19
29+8b = -19
8b= -19- 29
8b = -48
b = -48/8
b = -6