решите систему х-у=4 х2-у2=40

Question

решите систему

х-у=4

х2-у2=40

Answer 1

4(x + y) = 40
x + y = 10

2x = 14
x = 7
7 + y = 10
y = 3

Comments

OF

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X-Y=4

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(X-Y)(X+Y)=40

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4(x + y) = 40
x + y = 10

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X-Y=4

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X+Y=10

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2x = 14
x = 7
7 + y = 10
y = 3