Question

Simplify: 3x(4x -5) + 3 and find its value for x = 1
/2​

Answer 1

Answer:

Explanation: here,

X=3

= 3×3(4×3-3) +3

=9(12-3) +3

= 9(9) +3

= 81+3

= 84

Step-by-step explanation:

Make me brilliant ☺️

Answer 2

:

Mark Me As Brainliest And Thank Me If The Answer Is Useful.

-- :

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