Sign In
Ask Question
Mathematics
Halle Weiss
28 January, 11:08
4x^2-81 how do I solve this?
+1
Answers (
1
)
Susan Cortez
28 January, 14:24
0
4x^2-81 let's solve this.
First, Rewrite it in the form a^2-b^2, where a=2x and b=9
(2x) ^2 - 9 2
Second, use difference of squares: a^2-b^2 = (a+b) (a-b)
(2x+9) (2x-9)
difference of squares==> a^2-b^2 = (a+b) (a-b)
For Example: x^2-4
First, Rewrite it in the form a^2-b^2 , where a=x and b=2
x^2-2^2
and then again use the difference of squares: a^2-b^2 = (a+b) (a-b)
(x+2) (x-2)
Comment
Complaint
Link
Know the Answer?
Answer
Not Sure About the Answer?
Get an answer to your question ✅
“4x^2-81 how do I solve this? ...”
in 📙 Mathematics if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers
You Might be Interested in
The difference of two numbers is 5. Their sum is 19. What are the numbers?
Answers (2)
The sum of three consecutive odd integers is - 111, find the three integers
Answers (1)
what is the answer to my equation (2-1) + 9:3?
Answers (2)
F (x) = 0.825x how to find the inverse
Answers (1)
What method most efficient to use to solve x^2+6x-7=0
Answers (1)
New Questions in Mathematics
Solve this equation to find x: 2 - (3x - 4) = 2x - 9. how do i do that
Answers (1)
In ΔOPQ, q = 6.5 inches, o = 8.6 inches and ∠P=55°. Find ∠Q, to the nearest 10th of an degree
Answers (1)
Neal buys a board game. He pays for the board game and pays $1.54 in sales tax. The sales tax rate is 5.5%. What is the original price of the board game?
Answers (1)
Add 3/4 + 3/4 simplify answer
Answers (2)
Let f (x) = 8x+8 find and simply f (x+1)
Answers (2)
Home
»
Mathematics
» 4x^2-81 how do I solve this?
Sign In
Sign Up
Forgot Password?