The sum of x2 – y
2
and y2 – x
2
is __________.
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The sum of x2 – y
2
and y2 – x
2
is __________.
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2x²+ +2y²
Step-by-step explanation:
=> x2-y2 +y2-x2
x²+x² +y²+y2
2x² +2y²