Question

tìm x thuộc n biết : 10+(2x-1)²:3=13

Answer 1

10+(2x-1)²:3=13

(2x-1)²:3=13-10

(2x-1)²:3=3

(2x-1)²=3.3

(2x-1)²=9

(2x-1)²=3²

=>2x-1=3

2x=3+1

2x=4

x=4:2

x=2