Solving algebraic equations with negative exponents

In summary, negative exponents are a way to represent fractions with a negative exponent. To solve algebraic equations with negative exponents, you can apply the rule a^-n = 1/a^n. An example of solving such an equation is 3x^-2 = 1, which can be rewritten as 3/x^2 = 1 and solved for x. There are special rules to keep in mind when solving equations with negative exponents, including the use of reciprocals and only combining terms with the same base and exponent. Solving equations with negative exponents can be useful in various fields, such as finance, physics, and chemistry, as it simplifies complex calculations and helps understand the relationships between variables in an equation
  • #1
Brittany8209
1
0
solve for x: x^-2 = 1/9



solve for x: x^-2 - 13x^-1 +36 = 0



I don't understand how to solve either equations.
 
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  • #2
Remember that [tex]x^{-a}=\frac{1}{x^a}[/tex] so try multiplying through by x2 in both.
 

FAQ: Solving algebraic equations with negative exponents

What are negative exponents?

Negative exponents are a way to represent fractions that have a negative exponent. They indicate that the base number should be divided by itself a certain number of times.

How do you solve algebraic equations with negative exponents?

To solve an algebraic equation with negative exponents, you can follow the rule that states a^-n = 1/a^n. This means that you can rewrite the equation by moving the base number from the denominator to the numerator and changing the sign of the exponent to positive.

Can you give an example of solving an algebraic equation with negative exponents?

Sure, let's say we have the equation 3x^-2 = 1. We can rewrite this as 3/x^2 = 1. Then, we can solve for x by multiplying both sides by x^2 and dividing by 1, giving us x = √3.

Are there any special rules for solving equations with negative exponents?

Yes, there are a few special rules to keep in mind. First, remember that a number raised to a negative exponent is equal to the reciprocal of the number raised to the positive exponent. Also, when dealing with variables, you can only combine terms with the same base and exponent.

How can solving equations with negative exponents be useful?

Solving equations with negative exponents can be useful in many applications, such as finance, physics, and chemistry. It allows us to easily represent and manipulate fractions, making complex calculations more manageable. It also helps us understand the relationships between different variables in an equation.

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