saralAdhikari saralAdhikari

24-08-2020
Mathematics

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X + Y is equal to 5 x minus Y is equal to 4 find the value of find the value of x square minus y square

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eunice1234 eunice1234

24-08-2020

Answer: 20

Step-by-step explanation:

x+y=5

x-y=4

---------

x+y=5

x=4+y

--------

(4+y)+y=5

4+y+y=5

4+2y=5

2y=1

y=0.5

x=4.5

---------

x²-y²=(4.5)²-(0.5)²=20.25-0.25=20

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