Question

Simplify this expression and write the result using positive exponents only​

Answer 1

Answer:

$\displaystyle 5b^{-4}$

Step-by-step explanation:

$\displaystyle 5b^{-4} = (-5a^4b^{-7})(-a^{-4}b^3) \\ \\ \frac{5}{b^4} = 5b^{-4}$

According to the Negative Exponential Rule [part II], you bring the denominator to the numerator WHILE ALTERING THE INTEGER SYMBOL FROM POSITIVE TO NEGATIVE:

$\displaystyle b^{-n} = \frac{1}{b^n}$

I am joyous to assist you anytime.