barberrussell2
barberrussell2
12-06-2018
Mathematics
contestada
One of the solutions to x^2-2x-15=0
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datguiser
datguiser
12-06-2018
Factor the equation out into (x-5)(x+3)
(x-5)=0
x=5
(x+3)=0
x=-3
x=5, -3
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Shaelrana
Shaelrana
12-06-2018
x^2-2x-15=0
or, x^2-5x+3x-15=0
or, x(x-5)+3(x-5)=0
or, (x-5) (x+3)=0
Either, Or,
x-5=0 x+3=0
x=5 x= -3
Answer Link
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