Question

|x+5|=3 tolong bantu kak besok di kumpulin

Answer 1

Verified answer

(x+5)²=3²
x²+10x+25=9
x²+10x+16=0
(x+2)(x+8)=0
x=-2 atau x=-8

Answer 2

Verified answer

Materi : Persamaan Nilai Mutlak

Pembahasan :
Cara 1, Kuadratkan kedua ruas
|x + 5| = 3
(x + 5)² = 3²
(x + 5)² - 3² = 0
(x + 5 + 3)(x + 5 - 3) = 0
(x + 8)(x + 2) = 0
x = -8
x = -2

Hp : {-8 , -2}

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Cara 2, Definisi Mutlak
|x + 5| = 3

x + 5 = 3 atau x + 5 = -3
x = 3 - 5 atau x = -3 - 5
x = -2 atau x = -8

Hp : {-8 , -2}