Question

1.2x^2+5x+3=0
2.12x^2-8x+1=0
3.3x^2+7x-6=0
4.4x^2-7x-2=0

Answer 1

1. 2x^2 + 5x + 3 = 0
→ (2x + 3)(2x + 2)/2 = 0
→ (2x + 3)(x + 1) = 0
→ x = -3/2 atau x = -1

2. 12x^2 - 8x + 1 = 0
→ (12x - 6)(12x - 2)/12 = 0
→ (12x - 6)(6x - 1)/6 = 0
→ (2x - 1)(6x - 1) = 0
→ x = 1/2 atau x = 1/6

3. 3x^2 + 7x - 6 = 0
→ (3x - 2)(3x + 9)/3 = 0
→ (3x - 2)(x + 3) = 0
→ x = 2/3 atau x = -3

4. 4x^2 - 7x - 2 = 0
→ (4x - 1)(4x + 8)/4 = 0
→ (4x - 1)(x + 2) = 0
→ x = 1/4 atau x = -2

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