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2x^2 - 6x= 8

2007-09-18 09:36:50 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

4 answers

same as x^2 - 3x - 4 = 0, and (x-4)(x+1) = 0, and so x = 4, -1

2007-09-18 09:42:13 · answer #1 · answered by John V 6 · 0⤊ 0⤋

make the equation equal to zero.

so 2x^2-6x=8 becomes

2x^2-6x-8= 0 then divide by to 2 to make the eqn more simple

it becomes x^2-3x-4 =0

factor out
( x-4)(x+1)

so answer becomes x= 4, -1
hope that helps

2007-09-18 16:50:31 · answer #2 · answered by jebo 1 · 0⤊ 0⤋

rearrange:

2x^2 - 6x - 8 = 0 factor a 2

x^2 - 3x - 4 = 0

(x -4)(x+1) = 0

x = -1, 4

2007-09-18 16:41:50 · answer #3 · answered by nyphdinmd 7 · 0⤊ 0⤋

the answer is 4, -1

2007-09-18 16:54:38 · answer #4 · answered by J priincess 1 · 0⤊ 0⤋