tìm x
2x^2=18 (x-1)^3=8 (2x-1)^4= 81 3^2^x.27=3^11
2^3×5 – (x +3^2)=10 3^2.x^2-2^3 . x^2 = 16 9(x+3) + 2^2 . 5^2 = 2^4 . 3^2 – 3^3
tìm x 2x^2=18 (x-1)^3=8 (2x-1)^4= 81 3^2^x.27=3^11 2^3×5 – (x +3^2)=10 3^2.x^2-2^3 . x^2 = 16 9(x+3) + 2^2 . 5^2 = 2^4 . 3^2 –
By Anna
2x^2= 18
=>x^2= 18:2=9
=>x^2=3^2
=>x=3
b, (x-1)^3=8
=>(x-1)^3=2^3
=>x-1=2
=>x=2+1=3
c, (2x-1)^4= 81
=>(2x-1)^4= 3^4
=>2x-1= 3
=>2x=4
=>x=4:2=2