Question

5. f(x) = 3x3 + x2 - 20x + 12, 8(x) = 3x - 2​

Answer 1

Answer:

5

Step-by-step explanation:

3x-2=0

3x=2

x=2\3

now f(x)=3x+3+2x-20x+18

now f(2\3)=3×2/3+3+2×2/3-20×2/3+12

=2+3+4/3-40/3+12

=17+4/3-40/3

=51+4-40/3

=15/3

=5(by lowest term)

I hope this will help you

Answer 2

Answer:

1.80

2.x=-2/5

Step-by-step explanation:

1st.x=2

so,

= 3×(2)³ +(2)² +20×2 +12

= 3×8 +4 +40+12

= 24+56

= 80 answer

2nd. 8x=3x-2

8x-3x = -2

5x= -2

x=-2/5