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(x+2)*(x+3)=56 Urgent <3 Multumesc


Răspuns :

xpatrat+3x+2x+6=56
xpatrat+5x+6=56
xpatrat+5x=56-6
xpatrat+5x=50
xpatrat+5x-50=0
delta=bpatrat+4ac
delta=25-4*1*(-50)
delta=25+200
delta=250
x1/2= -bpatrat+radical din delta supra /2a
x1/2=-5+radicaldin 250supra 2
(x+2)*(x+3)=56
x€{-10, 5}

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