Is this algebraic expression correct

  • Thread starter Thread starter JakePearson
  • Start date Start date
  • Tags Tags
    Expression
JakePearson
Messages
52
Reaction score
0
a(a-6) + 9 = 0
a2 - 6a + 9 = 0
(a - 3)(a - 3) = 0
a = -3

is this correct
 
Physics news on Phys.org
JakePearson said:
a(a-6) + 9 = 0
a2 - 6a + 9 = 0
(a - 3)(a - 3) = 0
a = -3

is this correct

All except for the last step. If a - 3 = 0, then a = ____
 

Thread 'Family of lines that are at a distance of 5 from the origin'

I picked up this problem from the Schaum's series book titled "College Mathematics" by Ayres/Schmidt. It is a solved problem in the book. But what surprised me was that the solution to this problem was given in one line without any explanation. I could, therefore, not understand how the given one-line solution was reached. The one-line solution in the book says: The equation is ##x \cos{\omega} +y \sin{\omega} - 5 = 0##, ##\omega## being the parameter. From my side, the only thing I could...
View full post »

Similar threads

How to find the range of a function with square roots?
Replies
23
Views
2K
Help simplifying this algebraic expression please
Replies
4
Views
1K
Determine whether each of the ISBNs below is correct
Replies
7
Views
2K
Why Does Solving y+3=3√(y+7) Yield Extraneous Solutions?
Replies
8
Views
2K
Are these values of the following correct? (Complex cube root of unity)
Replies
9
Views
2K
Are Complex Solutions Overlooked When Solving \(16x^4 = 81\) Directly?
Replies
5
Views
3K
No integer whose digits add up to ## 15 ## can be a square or a cube
Replies
4
Views
3K
Find the missing digits in this problem about an invoice
Replies
1
Views
2K
What Are the Values of A, B, and C for the Given Expression?
Replies
19
Views
2K
Show that ## a^{2}-a+7 ## ends in one of the digits ## 3, 7 ,9##
Replies
6
Views
2K

Hot Threads

Recent Insights

Back
Top