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Help please...and steps
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Help please...and steps

Help please...and steps-example-1
User Alaster
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1 Answer

5 votes

Answer: A

Step-by-step explanation:

x² - y² = -3

x⁴ - y⁴ = -15 ⇒ (x² - y²)(x² + y²) = -15

↓

-3 (x² + y²) = -15

÷ -3 ÷ -3

x² + y² = 5

User Tschareck
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