Answer: 0.3846153846
Step-by-step explanation:
The pair of rational numbers with their sum are matched.
<h3 /><h3>What is rational number?</h3>
The numbers in the form of p/q is called the rational number.
1. -2/a²b +2/ab² = ( -2ab² +2a²b) / a³b³
= 2(a-b)/a²b²
2. 1/2ab -1/4a²b² =( 4a²b² -2ab) / 8a³b³
= 2ab -1 /4a²b²
3. 2/a²b³ -2/ab = (2ab -2a²b³) / a³b⁴
= 2( 1- ab²) /a²b³
4. 1/ab³ -1/a²b = a²b - ab³ / a³b⁴
= (a - b²) / a²b³
Thus, all the rational numbers are matched with their sum.
Learn more about rational numbers.
brainly.com/question/17450097
SPJ1
Answer:
principal square root
Step-by-step explanation:
Let 
.
Then 
We have a negative square root for x, which is 
and a nonnegative square root,which is 
The nonnegative square root is callled the principal square root .
Therefore the best complete to the statement;
A -------- is the nonnegative Square root of a number, is principal square root.
Answer:
556
Step-by-step explanation:
So, 378/189=2. So it will double two times. x2x2=x4. 139x4=556.
