Question

$y2 + 10y + 21 = 0$
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Answer 1

Respuesta:

y2+10y+21=0

y2+10y+21=0  

(1)⋅y2+(10)⋅y+(21)=0

y=−(10)±(10)2−4⋅(21)−−−−−−−−−−−−√2

y=−10±100−(84)−−−−−−−−−√2

y=−10±16−−√2

y=−10±(4)2

y1=−62=(2)⋅(−3)(2)=−3

y2=−142=(2)⋅(−7)(2)=−7