DerryDelaney
DerryDelaney
16-10-2016
Mathematics
contestada
How do you factorise x^2 - 9.
Respuesta :
Diana5674
Diana5674
16-10-2016
x ^ 2 - 9
= x ^ 2 - 3 ^ 2
It turns into 3 ^ 2
Because 3 ^ 2 = 9
The final answer is
= ( x + 3 )( x - 3 )
remember the formula :
a^2 - b^2 =(a+b)(a-b)
Answer Link
VER TODAS LAS RESPUESTAS ( 92+ )
Otras preguntas
how were houses built in the neolithic age
The classification of rabbits
Which process repeatedly moves matter between different forms on Earth? a. cycle b. natural law c. closed system d. conservation of matter
your weight will change depending on
editing tool for quickly making a repeated change throughout a document
All of the following are examples of primary sources EXCEPT: A. a journal written by a soldier who fought in World War I B. a world history textbook C. Presiden
the area of a square is 36 Sq ft. if each side is lengthened by four feet. how could the perimeter of the new square be xalculated
How long does it take a snail to crawl 85 inches?
What is the purpose of the Sierra Club?
For home economics class, Sandra has 5 cups of flour. She made 3 batches of cookies that each used 1.5 cups of flour. Write and solve an expression to find the
