Toán Lớp 7: 3.(x+3) mũ 2-10=17
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Toán Lớp 7: 3.(x+3) mũ 2-10=17
bai nay tim x nha
Comments ( 2 )
=>3.(x+3)^2=17+10
=>3.(x+3)^2=27
=>(x+3)^2=27:3
=>(x+3)^2=9
=>[((x+3)^2=3^2),((x+3)^2=(-3)^2):}
=>[(x+3=3),(x+3=-3):}
=>[(x=3-3),(x=-3-3):}
=>[(x=0),(x=-6):}
Vậy x\in{0;-6}