Question

Verify x+y= y+x find the value of x y x=5/7 y= -3/2

Answer 1

- 15 / 14

Step-by-step explanation:

hence x + y = y + x

xy = 5/7 * (-3/2)

= -15/14

Answer 2

Answer: Let's consider first the L.H.S

i.e x+y

Here,         x=5/7  and   y=-3/2

Therefore ,

                    $x+y=\frac{5}{7} +(\frac{-3}{2} )$

                    $x+y=\frac{5}{7} -\frac{3}{2}$

                    $x+y=\frac{5*2}{7*2} -\frac{3*7}{2*7}$

                   $x+y=\frac{10-21}{14}$

                  $x+y=\frac{-11}{14}$

Now, taking R.H.S

                  $y+x=\frac{-3}{2}+\frac{5}{7}$

                 $y+x=\frac{-3*7}{2*7}+\frac{5*2}{7*2}$

                 $y+x=\frac{-21+10}{14}$

                 $y+x=\frac{-11}{14}$

Therefore , L.H.S =R.H.S

Hence verified  x + y = y + x

Now,         $x*y=\frac{5}{7} *\frac{-3}{2}$

                $x*y=\frac{-15}{14}$

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