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3 years ago

5

Factor

0x^{2} - 81y^{2}" align="absmiddle" class="latex-formula">

With steps

2 answers:

miss Akunina [59]3 years ago

8 0

Answer:

(10x - 9y)(10x + 9y)

Step-by-step explanation:

100x² - 81y² ← is a difference of squares and factors in general as

a² - b² = (a - b)(a + b)

100x² - 81y²

= (10x)² - (9y)²

= (10x - 9y)(10x + 9y)

Tpy6a [65]3 years ago

8 0

Answer:

Step-by-step explanation:

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5/4 to 3/8 as a percent change

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Well, what's the diffrence from 5/4 to 3/8?

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so, if we take 5/4 to be the 100%, what is 7/8 off of it in percentage anyway?

$\bf \begin{array}{ccll}
amount&\%\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
\frac{5}{4}&100\\\\
\frac{7}{8}&x
\end{array}\implies \cfrac{\quad \frac{5}{4}\quad }{\frac{7}{8}}=\cfrac{100}{x}\implies \cfrac{5}{4}\cdot \cfrac{8}{7}=\cfrac{100}{x}
\\\\\\
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dalvyx [7]

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Step-by-step explanation:

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