Question

of x+y=5 and x-y=5 then 4xy?​

Answer 1

Answer:

$4xy = (x + y) {}^{2} - {(x - y)}^{2}$

$= 5 {}^{2} - 5 {}^{2}$

$= 25 - 25$

$= 0$

Step-by-step explanation:

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Answer 2

The value of 4xy = 0

Given :

x + y = 5 and x - y = 5

To find :

The value of 4xy

Formula :

4xy = (x + y)² - (x - y)²

Solution :

Step 1 of 2 :

Write down the given equations

Here the given equations are

x + y = 5

x - y = 5

Step 2 of 2 :

Find the value of 4xy

We have

$\displaystyle \sf{ 4xy }$

$\displaystyle \sf{ = {(x + y)}^{2} - {(x - y)}^{2} }$

$\displaystyle \sf{ = {(5)}^{2} - {(5)}^{2} }$

$\displaystyle \sf{ = 25 - 25}$

$\displaystyle \sf{ = 0}$

Hence the required value of 4xy = 0

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