davisnaziyahovz5sk
26.02.2021 •
Mathematics
Solve; (a-b) power2 = (a+b)power2-4ab.
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Ответ:
Step-by-step explanation:
( a - b)² = ( a +b)² - 4ab
or
( a + b)² - (a-b)² = 4ab
LHS
( a + b)² - (a-b)²
= (a² + 2ab + b²) - (a² - 2ab + b²)
= a² + 2ab + b² - a² + 2ab - b²
= 4ab
RHS proved
Ответ:
The distribution with a larger median is (test scores after half day )
The distribution with larger mean is ( test scores after half day )
Step-by-step explanation: