michell282
11.03.2020 •
Mathematics
Factor completely.
81-100x^2
Solved
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Ответ:
(9 + 10x)(9 - 10x)
Step-by-step explanation:
81-100x²
recall that 81 = 9² and 100 = 10²
hence,
81 - 100x²
= 9² - 10²x²
= 9² - (10x)²
recall the algebraic property:
a² - b² = (a+b)(a-b)
applying this to our question,
9² - (10x)²
= (9 + 10x)(9 - 10x)
Ответ:
a. They both have strong positive correlation.
Step-by-step explanation: