2007-06-02 05:40:25 · 7 answers · asked by rosettahadakid101 1 in Science & Mathematics ➔ Mathematics
(2x-30) (x+60) = 0
<=> x+60 =0 or 2x-30 = 0
<=> x = -60 or x = 15
<=>: equivalent to
2007-06-02 05:43:59 · answer #1 · answered by roman_king1 4 · 0⤊ 0⤋
(2x - 30) (x + 60) = 0
<=>2x - 30 = 0 <=> 2x = 30 <=> x = 15
or x + 60 = 0 <=> x = -60
=>>As a result, I came to the following conclusion:
x = 15 or x = -60
2007-06-02 12:49:41 · answer #2 · answered by â?«Mrs Matthonâ?« 1 · 0⤊ 0⤋
Is it 2x - 30 = x + 60 or is it (2x - 30) (x + 60) = 0 ?
If it is later, 2x - 30 = 0 and or x + 60 = 0 thus giving x = +15 or -60
If 2x - 30 = x + 60, we have 2x - x = 60 + 30 = 90
x = 90
2007-06-02 12:45:11 · answer #3 · answered by Swamy 7 · 0⤊ 0⤋
You can only solve for an unknown, x, if you have an equation.
Assuming that the product given has a result of 0,
(2x-30)(x+60) = 0
2x-30 = 0 and x+60 = 0
2x = 30 and x = -60
x = 15 and -60
2007-06-02 17:03:00 · answer #4 · answered by Kemmy 6 · 0⤊ 0⤋
(2x-30) (x+60)
2x -30 = 0
add 30 to both sides
2x -30 +30 = 0 +30
2x = 30
divide both sides
2x/2=30/2
x=15
Then do the same process for this one
x+60 = 0
x + 60 -60 = 0 -60
x= -60
2007-06-02 12:47:37 · answer #5 · answered by Invisble 4 · 0⤊ 0⤋
"Solve" applies to an equation and this is not an equation.
Multiply the brackets:-
= 2x² + 120x - 30x - 1800
= 2x² + 90x - 1800
= 2.(x² + 45x - 900)
= 2.(x + 60).(x - 15) , upon factorising.
NB
If = 0, x = - 60 , x = 15
2007-06-02 13:26:22 · answer #6 · answered by Como 7 · 0⤊ 0⤋
your given solution is incomplete.....
2007-06-02 12:49:48 · answer #7 · answered by Limarc N 2 · 0⤊ 0⤋