2x-2(-2+1)=4
Distribute the -2 to the numbers in parantheses.
2x+4-2=4
Combine all numbers
2x+2=4
Subtract 2 from both sides
2x=2
Then divide by two
x=1
the first step is multiplication
the second step is collect like terms
third step is division
Number 13 is 12 it’s a right angle so you do 90’-42 then you get 48 divide that by 4 your get 12
Power rules for both quotient and product sums are useful to simplify large exponential form (of the same base)
The difference is in the rule. For quotient sum, the powers are subtracted, while for product sum, the powers are added up.
An example for quotient sum
Using the principle of simplifying fractions, we can cancel out ten 7s from both numerator and denominator, leaving us with only three 7s on the numerator which gives us
. This working out could be simplified by doing
An example for product sum
. There is a total of eleven 9s if we were to work out the product sum the long way. This could be simplified by doing