Cullan
Cullan
13-01-2017
Mathematics
contestada
Quadratic equations: Factoring
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apologiabiology
apologiabiology
13-01-2017
remember
if ab=0, then assume that a and b equal 0
factor out common term
comon term in 6x^2 and 15x is 3x
3x(2x)+3x(5)=0
3x(2x+5)=0
set each to zero
3x=0
x=0
2x+5=0
2x=-5
x=-5/2
x=-5/2 and 0
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