Matematika 1. x²-4x-5=02. x²+2x-8=03. 2x²+3x=04. 2x²+5x+3=05. x²-4=0​

buckroweulv – June 07, 2023

1. x²-4x-5=0
2. x²+2x-8=0
3. 2x²+3x=0
4. 2x²+5x+3=0
5. x²-4=0​

Jawab:

1. x = {5, -1}

2. x = {2, -4}

3. x = {0, -³/₂}

4. x = {-³/₂, -1}

5. x = {-2, 2}

Penjelasan dengan langkah-langkah:

1. x²-4x-5=0

(x-5)(x+1) = 0

x = {5, -1}

2. x²+2x-8=0

(x-2)(x+4) = 0

x = {2, -4}

3. 2x²+3x=0

(1/2)(2x.....)(2x......) = 0

x²+3x = 0

x(x+3) = 0

(1/2)(2x+0)(2x+3) = 0

x = {0, -³/₂}

4. 2x²+5x+3=0

(1/2)(2x.....)(2x......) = 0

x²+5x+6=0

(x+3)(x+2) = 0

(1/2)(2x+3)(2x+2) = 0

(2x+3)(x+1) = 0

x = {-³/₂, -1}

5. x²-4=0​

x² = 4

x = ±√4

x = {-2, 2}

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