Question

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

Answer 1

3x(4x−5)+3

=12x

2

−15x+3

Putting the value of x we get,

12(

2

1

)

2

−15(

2

1

)+3

=12×

4

1

−15

2

1

+3

=3−

2

15

+3

=

2

6−15+6

=−

2

3

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