Question

Ecuații
1) 6×+1=7
2) ײ+2×+1=0
3)
$\sqrt{2 \times - 4} = 2$





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Answer 1

Salutare!

Rezolvare:

1) 6x+1=7 |-1

6x=6 | :6

x=1

2) x²+2x+1=0

x²+x+x+1=0

x(x+1)+(x+1)=0

(x+1)(x+1)=0

(x+1)²=0 |√

x+1=0 |-1

x= -1

3) √(2x-4)=2 |^2

(2x-4)=4 |+4

2x=8 |:2

x=4

Cu drag!