Pre Algebra (Period 2 & 4)

Exponents ( continued) 9

Review the odd/even rule


IF THERE IS A NEGATIVE INSIDE PARENTHESES:

Odd number of negative signs or odd power = negative

Even number of negative signs or even power = positive



EXAMPLES:
(-2)⁵ = -32

(-2)4<.sup>= +16



IF THERE IS A NEGATIVE BUT NO PARENTHESES:
ALWAYS NEGATIVE!

-2⁵ = -32

-2⁴ = -16

Finish CHAPTER 4-8

NEGATIVE POWERS = FRACTIONS

They're in the wrong place in the fraction

m³/m⁵ = m^-2     

   m³/m⁵

= mmm/ mmmmm

= 1/mm



Again, by transitive property of equality:


m³/m⁵ = m^-2 = 1/m²

Remember the rule of powers with (  ) 

When there is a product inside the (  ), then everything inside is to the power!

If there are no (  ), then only the variable/number right next to the power is raised to that power.

3x^-2does not equal (3x)^-2
The first is 3/x² and the second is 1/9x²

RESTATE A FRACTION INTO A NEGATIVE POWER:

1) Restate the denominator into a power

2) Move to the numerator by turning the power negative



EXAMPLE:

1/32

1/(2)⁵