Question

$x2 - 2x - 15 = 0$
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Answer 1

Answer:

x=10,-6

Step-by-step explanation:

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Answer 2

Answer:

=>x²-2x-15=0

=>x²-(5-3)x-15=0

=>x²-5x+3x-15=0

=>x(x-5)+3(x-5)=0

=>(x-5)(x+3)=0

Either, or,

x-5=0 x+3=0

x=5 x= -3