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Question

Solve the following quadratic equation: x2+8x+15=0


A

x= √15

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B

x= - √15

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C

x = √15 or x = - √15

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D

x = ± 15

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Solution

The correct option is C

x = √15 or x = - √15


Given: x2+8x+15=0

x2+3x+5x+15=0

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

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

(x=3,5)


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