\(2\left(x-1\right)^3-50=-300\)
\(\Leftrightarrow2\left(x-1\right)^3=-300+50\)
\(\Leftrightarrow2\left(x-1\right)^3=-250\)
\(\Leftrightarrow\left(x-1\right)^3=-250:2\)
\(\Leftrightarrow\left(x-1\right)^3=-125\)
\(\Leftrightarrow\left(x-1\right)^3=5^3\)
\(\Leftrightarrow x-1=5\)
\(\Leftrightarrow x=6\)
Vậy \(x=6\)
\(2.\left(x-1\right)^3-50=-300\)
\(\Rightarrow2.\left(x-1\right)^3=-250\)
\(\Rightarrow\left(x-1\right)^3=-125\)
\(\Rightarrow x-1=-5\)
\(\Rightarrow x=-4\)
\(2.\left(x-1\right)^3-50=-300\\ =>2.\left(x^3-1\right)=-250\)
\(=>2x^3=-248\)
\(=>x^3=-124\)
Đề sai hay mk làm sai v ?
\(\text{2.(x-1)}^3\)= (-300) + 50
\(\text{2.(x-1)}^3\)= (-250)
\(\text{(x-1)}^3\)= (-250) : 2
\(\text{(x-1)}^3\)= -125
\(\text{(x-1)}^3\)= \(-5^3\)
\(\Rightarrow\)x - 1 = -5
x = (-5) + 1
x = -4
\(2\left(x-1\right)^3-50=-300\)
\(2\left(x-1\right)^3=-300+50\)
\(2\left(x-1\right)^3=-250\)
\(\left(x-1\right)^3=-250:2\)
\(\left(x-1\right)^3=-125\)
\(x-1=-5^3\)
\(x=-124\)
Vậy \(x\)=-124
hok tốt
2(x-1)3-50=-300
2(x-1)3=-300+50
2(x-1)3=-250
(x-1)3=-250:2
(x-1)3=-125
(x-1)3=(-5)3
x-1=-5
x=-5+1
x=-4
Vậy x=4
2(x-1)3-50=-300
<=>2(x-1)3=-250
<=>(x-1)3=-125
<=>(x-1)3=(-5)3
=>x-1=-5
<=>x=-4
Vậy.........
ak mik lỗi chỗ cuối nha
\(x-1=-5\)
\(x=-5+1\)
\(x=-4\)
Vậy x-=-4 nha hok tốt
Mưaa you sai chứ ai :v_3
\(2\left(x-1\right)^3-50=-300\)
\(2\left(x-1\right)^3=-300+50=-250\)
\(\left(x-1\right)^3=-125\)
\(\left(x-1\right)^3=\left(-5\right)^3\)
\(x-1=-5\)
\(x=-4\)
