Question

23.Himpunan penyelesaian dari |x + 9|=2 adalah
24.Nilai x yang memenuhi persamaan |7 - 2x|=1 adalah

Answer 1

Verified answer

Kelas 10 Matematika
Bab Nilai Mutlak

23] |x + 9| = 2

x + 9 = 2
x = 2 - 9
x = - 7

x + 9 = -2
x = -2 -9
x = -11

HP = { -11, -7 }

24] |7 - 2x| = 1

7 - 2x = 1
-2x = 1 - 7
x = -6/-2
x = 3

7 - 2x = -1
-2x = -1 - 7
x = -8/-2
x = 4

Jadi, x = 3 dan x = 4

Answer 2

1) x + 9 =2
x = -7 ( tidak memenuhi)

-x -9 = 2
-x = 11
x = - 11 (tidak mmenuhi )

HP = {}

2) 7-2x = 1
-2x = -6
x = 3

-7+2x =1
2x = 8
x = 4

HP = { 3,4}