midnightcrow541 midnightcrow541

19-07-2022
Mathematics

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if x+y=7/10 and x-y=5/14 then x^2-y^2=?

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Аноним Аноним

19-07-2022

x+y=7/10=0.7
x-y=5/14≈0.3

Add both

2x=1
x=1/2=0.5

Put in first one

y=0.7-0.5
y=0.2

Find

x²+y²
(0.5)²+(0.2)²
0.25+0.04
0.29

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