Question

23. Simplify 3x(4x – 5) + 3 and find its values for x = 1/2​

Answer 1

Answer:

1.5

Step-by-step explanation:

3x(4x-5)+3

12x^2 - 15x + 3

for value p(x)= 1/2

12(1/2)^2 -15(1/2) + 3

1.5

Answer 2

:

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3x(4x−5)+3=12x^2−15x+3

x=3 gives the value 12(9)−15×3+3

                             =108−45+3

                              =66

x=1/2 gives the value 12(1/4)−15×(1/2)+3

                             =3−7.5+3

                              = - 3/2