2007-06-02 05:39:18 · 6 answers · asked by rosettahadakid101 1 in Science & Mathematics ➔ Mathematics
You can't solve something that's not an equation. An equation must have an equals sign in it. You have provided what we call an expression.
2007-06-02 05:41:55 · answer #1 · answered by emp211 3 · 0⤊ 0⤋
As before, I will assume that the product given is equal to 0.
(7x-40)(4x+5) = 0
7x-40 = 0 and 4x+5 = 0
7x = 40 and 4x = -5
x = 40/7 and x = -5/4
x = 5 5/7 and -1 1/4
2007-06-02 17:04:22 · answer #2 · answered by Kemmy 6 · 0⤊ 0⤋
If your question was for (7x-40)(4x+5)=0
Then
x = -1.25
or
x = 40/7 =~ 5.714
Method:
multiply both sides by (7x-40) to give 4x+5=0
so 4x=-5
or
multiply both sides by (4x-5) to give 7x-40=0
7x=0
2007-06-02 12:47:55 · answer #3 · answered by Alec 1 · 0⤊ 0⤋
is this = 0?
If so:-
7x = 40 ,4x = - 5
x = 40/7 , x = - 5/4
2007-06-02 14:12:24 · answer #4 · answered by Como 7 · 0⤊ 0⤋
multiplying the terms
(7x - 40)(4x + 5) = 28x^2 +35x - 160x - 200 =
=28x^2- 125x- 200
solving this simultaneous equation
x=8
or
x=-1.75
2007-06-02 12:48:42 · answer #5 · answered by amala_chennai_india 1 · 0⤊ 0⤋
Got it !!
x = 11.666666666666666666666666666667
2007-06-02 12:44:19 · answer #6 · answered by Anonymous · 0⤊ 0⤋