Explicación paso a paso:
x² + y² = 56
x - y = 2
por sustitucion:
(2 + y)² + y² = 56
4 + 4y + y² + y² = 56
2y² +4y + 4 - 56 = 0
2y² + 4y - 54 = 0
x = -4 +/- √(4)² - 4(2)(-54)
2(2)
x = -4 +/- 21,16
4
x1 : (-4 + 21,16) / 4 = 4,29
x2: (-4 - 21,16) / 4 = -6,29
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Explicación paso a paso:
x² + y² = 56
x - y = 2
por sustitucion:
(2 + y)² + y² = 56
4 + 4y + y² + y² = 56
2y² +4y + 4 - 56 = 0
2y² + 4y - 54 = 0
x = -4 +/- √(4)² - 4(2)(-54)
2(2)
x = -4 +/- 21,16
4
x1 : (-4 + 21,16) / 4 = 4,29
x2: (-4 - 21,16) / 4 = -6,29