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what is the root of the ×2+5x+4=0

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Cheahjimmyviz
x² + 5x + 4 = 0
(x + 4)(x + 1) = 0      >  the factor of 4 which is  4, 1 when added up
                                         should = 5 which is the coefficient of x
x = -4  or  x = -1