Q. ( -frac{2}{3} x_{1}^{1} – frac{2}{sqrt{3}} x_{1}^{2} ).

Answer

Explanation: \(x_{1}^{1}=x_{1}\), so the expression simplifies to \(-\frac{2}{3}x_{1}-\frac{2}{\sqrt{3}}x_{1}^{2}\).

Final result: \(-\frac{2}{3}x_{1}-\frac{2}{\sqrt{3}}x_{1}^{2}\)

Detailed Explanation

Step 1 — Write the original expression

\( -\frac{2}{3}x_{1}^{1} – \frac{2}{\sqrt{3}}x_{1}^{2} \)

Step 2 — Simplify the exponents (any variable to the first power is itself)

\( x_{1}^{1} = x_{1} \), so the expression becomes

\( -\frac{2}{3}x_{1} – \frac{2}{\sqrt{3}}x_{1}^{2} \)

Step 3 — Identify a common factor. Both terms contain the factor \( -2 \) and at least one factor \( x_{1} \). Factor out \( -2x_{1} \).

Divide each term by \( -2x_{1} \):

First term: \( \dfrac{-\tfrac{2}{3}x_{1}}{-2x_{1}} = \dfrac{1}{3} \).

Second term: \( \dfrac{-\tfrac{2}{\sqrt{3}}x_{1}^{2}}{-2x_{1}} = \dfrac{x_{1}}{\sqrt{3}} \).

Thus

\( -\frac{2}{3}x_{1} – \frac{2}{\sqrt{3}}x_{1}^{2} = -2x_{1}\!\left(\frac{1}{3} + \frac{x_{1}}{\sqrt{3}}\right) \)

Step 4 — (Optional) Present an equivalent form with a rationalized or simpler inner coefficient. Note that \( \frac{1}{\sqrt{3}} = \frac{\sqrt{3}}{3} \). Using that, put the factor outside as \( -\frac{2x_{1}}{3} \):

\( -2x_{1}\!\left(\frac{1}{3} + \frac{x_{1}}{\sqrt{3}}\right)
= -\frac{2x_{1}}{3}\!\left(1 + \sqrt{3}\,x_{1}\right) \)

Final simplified (factorized) forms:

  • \( -\dfrac{2}{3}x_{1} – \dfrac{2}{\sqrt{3}}x_{1}^{2} = -2x_{1}\!\left(\dfrac{1}{3} + \dfrac{x_{1}}{\sqrt{3}}\right) \)
  • Equivalent alternative: \( -\dfrac{2}{3}x_{1} – \dfrac{2}{\sqrt{3}}x_{1}^{2} = -\dfrac{2x_{1}}{3}\!\left(1 + \sqrt{3}\,x_{1}\right) \)
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Algebra FAQs

What does the expression \(\ -\frac{2}{3}x_{1}^{1} - \frac{2}{\sqrt{3}}x_{1}^{2}\) mean?

It means \( -\frac{2}{3}x_{1} - \frac{2}{\sqrt{3}}x_{1}^{2} \); the exponent \(1\) is redundant. It's a quadratic (in \(x_{1}\)) with coefficients \(a = - \frac{2}{\sqrt{3}}, b = - \frac{2}{3}, c = 0\).

How can I simplify or factor this expression?

Factor common factors: \(-\frac{2}{3}x_{1}\left(1+\sqrt{3}\,x_{1}\right)\). Equivalently, \(-x_{1}\left(\frac{2}{3}+\frac{2}{\sqrt{3}}x_{1}\right)\)..

What is the derivative with respect to \(x_{1}\)?.

Differentiate termwise: \( \frac{d}{dx_{1}}\!\left(- \frac{2}{3}x_{1} - \frac{2}{\sqrt{3}}x_{1}^{2}\right) = - \frac{2}{3} - \frac{4}{\sqrt{3}}x_{1}. \)

How do I find critical points (solve for stationary points)?

Set the derivative to zero: \(\; - \frac{2}{3} - \frac{4}{\sqrt{3}}x_{1} = 0\), so \(x_{1} = -\frac{\sqrt{3}}{6}\)..

How do I evaluate the expression numerically, e.g., at \(x_{1}=1\)?

Plug in \(x_{1}=1\): \(\;-\frac{2}{3}-\frac{2}{\sqrt{3}} \approx -0.6667-1.1547 \approx -1.8214..\)

Can I complete the square for this quadratic?

Can I complete the square for this quadratic?

Are there any domain restrictions?

No. The expression is a polynomial in \( x_{1} \) (with irrational coefficient), so domain is all real numbers (and complex numbers if desired)..

How to convert the coefficient \(\frac{2}{\sqrt{3}}\) to a rationalized form?.

Multiply numerator and denominator by \( \sqrt{3} \): \( \frac{2}{\sqrt{3}} = \frac{2\sqrt{3}}{3} \)..
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