1.3xexponent5+4x-7 for x=1
2.7xexponent3-2xexponent2+1 for x= -1
2006-11-02 11:32:11 · 6 answers · asked by »-(¯`v´¯)--»katery 2 in Science & Mathematics ➔ Mathematics
-4x^2+5x-2for x=3
2x^2-3+1for x=2
2006-11-02 11:48:12 · update #1
1) 3x^5 + 4x - 7, x = 1
Just replace x with 1
3(1^5) + 4(1) - 7
= 3 + 4 - 7
= 0
2) 7x^3 - 2x^2 + 1, x = -1
Just replace x with -1
7(-1)^3 - 2(-1)^2 + 1
= -7 - 2 + 1
= -8
2006-11-02 11:34:49 · answer #1 · answered by MsMath 7 · 0⤊ 2⤋
1. 3x^5 + 4x - 7 @ x = 1 =
3 + 4 - 7 = 0
2. 7x^3 - 2x^2 + 1 @ x = -1 =
- 7 - 2 + 1 = -8
2006-11-02 19:49:05 · answer #2 · answered by Helmut 7 · 0⤊ 0⤋
1)3x Exponent 5 + 4x - 7 for x = 1
3^(5 + 4(1) - 7) so you will have 3^2 = 9
2) 7x Exponent 3 - 2x Exponent 2 + 1 for x = -1
-7^3 - (-2)^3 = -343 + 8 = -335
2006-11-02 19:40:05 · answer #3 · answered by Galaxy D 2 · 0⤊ 1⤋
1.)
3x^5 - 4x - 7
3(1)^5 - 4(1) - 7
3(1) - 4 - 7
3 - 4 - 7
-1 - 7
-8
--------------------
2.)
7x^3 - 2x^2 + 1
7(-1)^3 - 2(-1) + 1
7(-1) + 2 + 1
-7 + 2 + 1
-5 + 1
-4
2006-11-02 19:49:03 · answer #4 · answered by Sherman81 6 · 0⤊ 0⤋
i'm bit confused...
if the questions is
(3x^5)+4x-7
then ansewer is
240.
but if its
3x^(5+4x-7)
then its = 9
similarly
(7x^3) - (2x^2) + 1
= -338
2006-11-02 19:49:42 · answer #5 · answered by shandanger 1 · 0⤊ 0⤋
1)0
2)-8
I'm 110% positive I'm correct.
2006-11-02 19:37:28 · answer #6 · answered by tiffyswig 1 · 0⤊ 0⤋