Предмет: Математика, автор: XL2006

(y-5)(y+9)=0 пожалуйста решите пж

Ответы

Автор ответа: SaSHaqw1

y²+9y-5y-45=0
y²+4y-45=0
D=4²-4*1*(-45)=196=√196=14,D>0
y1=4-142=-5
y2=4+142=9

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