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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 7: (x+5) mũ 3= -27 nhanh giúp mik

Toán Lớp 7: (x+5) mũ 3= -27
nhanh giúp mik

Comments ( 2 )

  1. ( $x$ $+$ $5$ )$^{3}$ = $-27$
    $=>$( $x$ $+$ $5$ )$^{3}$ = $-3^{3}$ 
    $=>$ $x$ + $5$ = $-3$
    $x$ = $-3$ – $5$
    $x$=$-8$

  2. (x+5)³=(-27)
    ⇒(x+5)³=(-3)³
    ⇒x+5=-3
    ⇒x=-3-5
    ⇒x=-8
    Vậy x=-8
     

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222-9+11+12:2*14+14 = ? ( )