Question

Which of the following equations has its one of the root 2?​

Answer 1

Answer:

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Answer 2

Substituting x=2 in given equations

A:

x

2

+4x−5⇒(2

2

)+4×2−5⇒4+8−5=7

B:

x

2

+3x+12⇒(2

2

)+3×2+12⇒4+6+12=22

C:

2x

2

−7x+6⇒2(2

2

)−7×2+6⇒8−14+6=0

D:

3x

2

−6x+2⇒3(2

2

)−6×2+2⇒12−12+2=2