Question

Q.N.6: If x= 1, y = 2. Find the value of 4x?y?-12xy +9

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Answer 1

as per the given data

$x=1\\y=2$

find the value of

$4xy-12xy+9$

put the value of $x=1$ and $y=2$ in the equation and simplify

=$4(1)(2)-12(1)(2)+9$

=$4(2)-12(2)+9$

=$8-24+9$

=$-7$

therefore the final answer to the question is -7

Answer 2

Answer:

The value of $4xy-12xy +9$ is -7 .

Step-by-step explanation:

Given -

$x= 1\\y = 2$

To find -

The value of $4xy-12xy +9$

Solution -

$4xy-12xy +9$

Put the given value of x and y

= $4\times 1\times2-12\times 1\times2 +9$

After multiplication we get

= $8-24+9$

As 24 is negative and 9 is positive subtraction occurs

Subtract 9 from 24 we get

= $8-15$

Now subtract 8 from 15 we get

= $-7$

∴ The value of $4xy-12xy +9$ is -7 .