Question

which of the following equations has 2 as a root​

Answer 1

Answer:

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Step-by-step explanation:

Substituting x=2 in given equations 

A:

x2+4x−5⇒(22)+4×2−5⇒4+8−5=7

B:

x2+3x+12⇒(22)+3×2+12⇒4+6+12=22

C:

2x2−7x+6⇒2(22)−7×2+6⇒8−14+6=0

D:

3x2−6x+2⇒3(22)−6×2+2⇒12−12+2=2