JohnBradley8657
29.01.2020 •
Mathematics
Verify the identity: (a^2+b^2)(x^2+y^2)=(ax-by)^2+(bx+ay)^2
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Ответ:
a²x²-2axby+b²y²+b²x²+2axby+a²x²
a²x²+b²x²+b²y²+a²x²
(a²+b²)x²+(a²+b²)y²
(a²+b²)(x²+y²)
Ответ:
Its 9.5
Step-by-step explanation:
You do 19÷2=9.5
Hope this helps