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If one of the roots of the quadratic equation 2x^2 + px + 4 = 0 is 2, then what is the other root of the equation?

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If one of the roots of the quadratic equation 2x^2 + px + 4 = 0 is 2, then what is the other root of the equation?
posted Jul 31, 2018 by anonymous

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1 Answer

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2x^2 + px + 4 = 0
if one of the roots is 2 then we have
2*2^2+2p+4=0-->p= -6
with p known we have
2x^2- 6x+4=0--> x^2-3x+2=0--> (x-2)(x-1)=0
x1=2
x2=1

answer Jul 31, 2018 by Hanifa Mammadov
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