answer 4 .............5(3m+9)(5m-15)=0?

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answer 4 .............5(3m+9)(5m-15)=0?

2006-11-25 15:55:16 · 5 answers · asked by what up 1 in Science & Mathematics ➔ Mathematics

5 answers

What makes 3m+9=0 and 5m-15=0?

2006-11-25 15:56:42 · answer #1 · answered by Cassi 2 · 0⤊ 0⤋

One of the two factors must equal 0.

if 3m+9= 0, then m= -3
if 5m-15=0, then m=+3

2006-11-26 00:08:14 · answer #2 · answered by hls 6 · 0⤊ 0⤋

5(3m+9)(5m-15)=0
15(m+3)(5m-15)=0
45(m+3)(m-3)=0

it would also mean that m would equal 3 or -3, to make (m-3) and (m+3) equal 0. this is to satify the equation 5(3m+9)(5m-15)=0.

2006-11-26 00:33:56 · answer #3 · answered by arumisan 2 · 0⤊ 0⤋

5(3m+9)(5m-15)=0 divide both sides by 5
5*3*5(m+3)(m-3)=0
m+3=0
m=-3

m-3=0
m=3

roots are 3,-3

2006-11-26 01:13:49 · answer #4 · answered by yupchagee 7 · 0⤊ 0⤋

m= -3, 3

2006-11-26 00:05:52 · answer #5 · answered by washingsea 3 · 0⤊ 0⤋