2007-01-16 08:41:22 · 6 answers · asked by alextapurpleyu 1 in Science & Mathematics ➔ Mathematics
y = x^2 - 2x - 1
x = -1 means replace x with -1
y = (-1)^2 - 2(-1) - 1
y = 1 + 2 - 1
y = 2
2007-01-16 08:44:20 · answer #1 · answered by MsMath 7 · 2⤊ 0⤋
The equation should be written as this: y = x^2 -2x - 1
First: the problem gives you the value for "x" > replace "-1" with "x" in the equation...
y = (-1)^2 - 2(-1) - 1
Sec: solve...
y = 1 + 2 - 1
y = 3 - 1
y = 2
2007-01-16 17:03:42 · answer #2 · answered by ♪♥Annie♥♪ 6 · 0⤊ 0⤋
y = x^2 -2x -1
= (-1)^2 - 2(-1) - 1
= 1 + (2)(negative times negative = positive) - 1
= 1 + 2 - 1
= 2
y = 2 for x = -1
2007-01-16 16:47:02 · answer #3 · answered by André S 2 · 1⤊ 0⤋
Plug in -1 for x and solve:
(-1)^2-2(-1)-1=2
2007-01-16 16:44:22 · answer #4 · answered by Anonymous · 1⤊ 0⤋
(-1)^2-2(-1)-1
1+2-1
2
Your answer is 2!
2007-01-16 16:44:29 · answer #5 · answered by Anonymous · 1⤊ 0⤋
wow guys.. you all are very smart..
I dont understand this language at all!
2007-01-16 16:48:51 · answer #6 · answered by Mystic Bell 3 · 0⤊ 1⤋