Question

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

with full explanation​

Answer 1

Answer:

132

Step-by-step explanation:

3× (4x-5)+3

( GIVEN : X=12 )

• 12x-15+3
• 12x-12
• 12×12-12
• 144-12
• 132

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