Question

2525,

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

(Non-anonymous question

)

. .

(3 Points)​

Answer 1

Answer:

= 3x(4x-5) +3

=(12x - 15x ) +3

= -3x +3

now by adding value ofx=3

= -3*3 + 3

= -9 +3 = -6

now by adding value of x = 1/2

= -3 * 1/2 +3

= 3/2

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