factorize:x^2+5√5x+30
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x^2 + 5√5 x + 30 = 0
x^2 + 3√5x + 2√5x + 30 = 0
x ( 2x + 3 √5 ) + 2√5 ( 2x + 3√5 ) = 0
x + 2√5 = 0 , 2 x + 3 √5 = 0
x = - 2√5 , x = - 3√5/2
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