1)3x + 5 = x + 1
3x - x = 1 - 5
2x = -4
x = -2
2) x^2 = 4
x = sqrt(4)
x = 2
3) -2x + 1 = 7 - x
-2x + x = 7 - 1
-x = 6
4) я не уверен в коментах напишите правильно ли решил
3x + 8 = |x|
3x + x = 8
4x = 8
5) (x + 17)(x + 2) = 0
x^2 + 17x + 2x + 34 = 0
x^2 + 19x + 34 = 0
19^2 - 4 * 1 * 34 = 361 - 136 = 225
(-19 + sqrt(225))/2 * 1 = -2
(-19 - sqrt(225))/2 * 1 = -17
6) -x = 2,5 - 0,5
-x = 2
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Answers & Comments
1)3x + 5 = x + 1
3x - x = 1 - 5
2x = -4
x = -2
2) x^2 = 4
x = sqrt(4)
x = 2
3) -2x + 1 = 7 - x
-2x + x = 7 - 1
-x = 6
4) я не уверен в коментах напишите правильно ли решил
3x + 8 = |x|
3x + x = 8
4x = 8
x = 2
5) (x + 17)(x + 2) = 0
x^2 + 17x + 2x + 34 = 0
x^2 + 19x + 34 = 0
19^2 - 4 * 1 * 34 = 361 - 136 = 225
(-19 + sqrt(225))/2 * 1 = -2
(-19 - sqrt(225))/2 * 1 = -17
6) -x = 2,5 - 0,5
-x = 2