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Question

The value of x from the equation
x2+2x3+x2x=5(x1) will be ____________.

A
{1,15}
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B
{15,13}
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C
{1,15}
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D
{12,15}
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Solution

The correct option is A {1,15}
x2+2x3+x2x5(x1)=0
(x+3)(x+1)+x(x1)5(x1)=0
x1[x+3+x5]=0
x1=0x1=0x=1
and when x+3=5x
x+3=5+x25x
25x=25x=15x=1
x=15
x=1,15

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