Answer:
Step-by-step explanation:
2) a(a + b) + b(a - b) - 2ab / a² - b²
= a² + ab + ab - b² - 2ab / a² - b²
= a² - b² / a² - b²
= 1
3) [x - 1/(x - 1)(x - 2)] + [x - 2/(x -2)(x - 3)]
= (1 / x - 2) + (1 / x - 3)
= x - 3 + x - 2 / (x - 2)(x - 3)
= 2x - 5 / x² - 5x + 6
the length of SR is 
.
<u>Step-by-step explanation:</u>
Here we have , On square PQRS below, if Q is located at (7,0) and R is located at (5,-8) . We need to find Length of side SR . Let's find out:
We know that , In a square there are 4 sides , and length of every side is same . So side length of SR = side length of QR . Now , Let's find side length of QR .
We know that distance between two points 
given by :
⇒ 
Two points given are 
:
⇒ 
⇒ 
⇒ 
⇒ 
⇒ 
But QR=SR , Therefore , the length of SR is .
The expression is twice the sum of four and a number is 2(4 + n). Then the correct option is A.
<h3>What is simplification?</h3>
Simplification is to make something easier to do or understand and to make something less complicated.
The condition is given as "twice the sum of four and a number".
Let the number be n. Then according to the condition, we have
The sum of four and a number (n) will be
4 + n
And the number is twice. Then the expression will be
2 × (4 + n)
Thus, the expression is 2 × (4 + n). Then the correct option is A.
More about the simplification link is given below.
brainly.com/question/12616840
1 5/6
1 1/3 = 4/3 (1x3+1)
4/3 and 1/2 do not have the same denominator so you'd have to find the lowest common denominator, which is 6. the new fractions would be 8/6 and 3/6 which would equal 11/6 or 1 5/6!
Hope that helps!
