4x+x^2
3(x+3)^2
x^2-2x+5
2007-06-04 17:54:34 · 9 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
4(3)+ 3^2= 12+9=21
3(3+3)^2= 3(9)^2= 3(81)= 243
3^2-2(3)+5= 6-6+5= 5
2007-06-04 17:59:08 · answer #1 · answered by pautler81 2 · 0⤊ 2⤋
4(3) + 3^2 = 12 + 9 = 21
3(3 + 3)^2 = 39
3^2 - 2(3) + 5 = 9 - 6 + 5 = 8
2007-06-05 01:01:44 · answer #2 · answered by brian b 1 · 0⤊ 0⤋
Because you know that x equals 3, all that is required is to replace every x with 3 and then follow order of operations to arrive at the correct answer.
4(3)+(3^2)=12+9=21
3((3+3)^2)=3(6^2)=3(36)=108
(3^2) - (2*3) + 5=9-6+5=8
Perform operations inside parentheses first, with exponential operations coming before multiplication, division, addition and subtraction.
2007-06-05 01:08:31 · answer #3 · answered by Rusty Coathanger 2 · 0⤊ 0⤋
4(3)+ 3^2= 12+9= 21
3(3+3)^2= 3(6)^2
3(6)^2 = 3(36)= 108
9-6+5= 8
2007-06-05 01:00:11 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Just put 3 in place of x in each expression
1. 4*3+3^2
=12+9
=21
2. 3(3+3)^2
=3(6)^2
=3*36
=108
3.3^2-2*3+5
=9-6+5
=8
2007-06-05 01:01:58 · answer #5 · answered by Jain 4 · 0⤊ 0⤋
4x+x^2 = 21
3(x+3)^2 = 108
x^2-2x+5 = 8
2007-06-05 00:59:31 · answer #6 · answered by Mock Turtle 6 · 0⤊ 0⤋
4(3)+3^2=
12+9=21
3(3+3)^2=
3(6)^2=
3*36=108
3^2-2(3)+5
9-6+5=8
2007-06-05 01:33:48 · answer #7 · answered by Dave aka Spider Monkey 7 · 0⤊ 0⤋
36
24
36
__
x= 9
- 6 pack
x= 3
2007-06-05 01:03:46 · answer #8 · answered by cbsmith300 3 · 0⤊ 0⤋
1. 21
2. 108
3. 8
2007-06-05 01:03:01 · answer #9 · answered by Mike N 2 · 0⤊ 0⤋