Which one of the following is not true??
a)2x^2-x-6=(2x+3)(x-2)
b)2x^2+x-6=(2x-2)(x+3)
c)2x^2-11x-6=(2x+1)(x-6)
d)2x^2+11x-6=(2x-1)(x+6)
2007-12-21 13:07:42 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
OPTION B IS FALSE.
TO be correct it should be 2x^2 +4x-6 on the LHS.
2007-12-22 21:25:05 · answer #1 · answered by BOND 3 · 0⤊ 0⤋
The second one is wrong. To be correct it would have to be:
2x^2 + 4x - 6 = (2x - 2)(x + 3)
2007-12-21 21:15:52 · answer #2 · answered by Charles M 6 · 0⤊ 1⤋
Multiply the binomials on the right to see if the product equals the expression on the left
Example:
a)
2x + 3
x - 2
- - - - -
2x^2 + 3x
. . . . - 4x - 6
- - - - - - - - -
2x^2 - x - 6 True
2007-12-21 21:19:14 · answer #3 · answered by kindricko 7 · 0⤊ 1⤋
b). is false. (2x-2)(x+3) = 2x² + 4x -6.
The others are all true. Just multiply out the right
sides with the FOIL rule.
2007-12-21 22:17:21 · answer #4 · answered by steiner1745 7 · 0⤊ 1⤋
a)2x^2-x-6=(2x+3)(x-2)
true
b)2x^2+x-6=(2x-2)(x+3)
false: (2x-2)(x+3) = 2x^2 = 4x - 6
c)2x^2-11x-6=(2x+1)(x-6)
true
d)2x^2+11x-6=(2x-1)(x+6)
true
2007-12-21 21:39:14 · answer #5 · answered by vlee1225 6 · 0⤊ 1⤋
a) true
b) false
c) true
d) true
2007-12-21 21:14:36 · answer #6 · answered by kellenraid 6 · 0⤊ 1⤋
option (B) is false
2007-12-22 02:48:42 · answer #7 · answered by chaitanya 1 · 0⤊ 1⤋