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If x2+y2 = 12 and x2-y2=18, what is the value of x4-y4?
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If x2+y2 = 12 and x2-y2=18, what is the value of x4-y4?

User Greenish
by
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1 Answer

3 votes

Answer:

Step-by-step explanation: add the equations

2x² = 30

x² = 15

y² = 12 - 15

= -3

x4 -y4 = 15² - (-3)²

= 216

User Pablo Ezequiel Leone
by
5.1k points
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