Algebra 1
posted by Tamir .
Hello. Can someone check my answers to the following
Factor each of the following
1. a^2  9
My answer
a^2  9 = 0
(a  3)a + 3)
2. 4a^2  4a+1
My Answer
4a^2  4a + 1
= 4a^2  2a  2a + 1
= 2a(2a  1)  1(2a  1)
= (2a  1)(2a  1)
3. 72  22x + x^2
My answer
72  22x + x^2
= x^2  22x + 72
= x^2  18x  4x + 72
= x (x  18)  4 (x  18)
= (x  4) (x  18)
4. Solve by factoring 3x^2 + 5x  2 =0
My Answer
3x^2+5x2=0
=3x^2+6xx2
=3x(x2)(x+2)
=(3x1)(x+2)
Oh, the x^2 is squared.
Thanks in advance.

1. correct
2. correct
3. correct but could go from 2nd line to last
4. correct
You know you can check these by foiling, right? (when you multiply out your answers and then see if you got what you started with)
Respond to this Question
Similar Questions

Algebra
Can someone check my algebra answers and help me with the problems I don't understand? 
Algebra
Can someone please check my answers. Solve the following by factoring x^ + 7x + 10 + 0 I got x + (5) and x = (2) 
Algebra
Can someone check my answers please? Solve the following by factoring? 
Algebra 2
Can someone check my answers. Write the following equations in standard form. 1) x^2  2x + y^2 + 4y = 11 answer: (x1)^2 + (y+2)^2 = 16 2) 4x^2 + 24x  y + 34 = 0 answer: y = 4(x3)^2 + 2 3) The graph of which equation is a circle? 
PreCalculuscheck answers
Which of the following results in the graph of f(x)=x^2 being expanded vertically by a factor of 3 and reflected over the xaxis? 
algebra
Hello. Can you explain to me how to factor the following? 
Algebra
Hello, can someone check my answers to the following Algebra questions 1. (2y)(2)= My answer  2 * 2 = 0 Translate 2 and 3 into an euation 2. Four less than the quotient of x divided by 2 is 8. My answer  (x * 2) 4 = 8 3. The sum … 
Algebra
Hello, can someone help me solve and check the following 1) x  8 = 20 Check: 2) x + 15 = 35 Check: 3) x +6 = 3 Check: The symbol 'x' is in italic. If I can understand the symbols better, I belive I can get the hang of the course. 
Algebra
Hello, can someone tell me if I got the following solve and check work correct? 
Introduction to Graphic Design
Hello! Thanks for checking my question out! ____ 1. Which of the following are examples of applied art?