Answer:
4.5
Step-by-step explanation:
60/20=3
3*1.5=4.5
(3a - 2)(4a + 5) = 12a^2 + 15a - 8a -10 = 12a^2 + 7a - 10
12÷3=4
cause 1/3 in this situation is 3 cause 12÷4 is 3
You have to be able to know the appropriate properties or postulates to apply on the angles or segments to simplify them. An example would be the Angle Addition Postulate. This postulates states that the sum of the individual measures of the interior angles is equal to the measure of the included angle. There are still a lot more properties to choose from depending on the situation.
You're using inverse operation to solve this equation. Now you just have to think about it. What number plus 20 would equal the same number squared? The answer would be 5, since
5+20=5^2
25=25
The statement above is true :)
Another number that would work for the equation would be x= -4
-4+20=-4^2
16=16
The statement above is also true so your answer would be x=-4 and 5