- 2x² - 5x - 2 = 0
2x² + 5x + 2 = 0
D = 5² - 4 * 2 * 2 = 25 - 16 = 9 = 3²
- 2x² - 5x - 2 = - 2(x + 0,5)(x + 2)
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Verified answer
- 2x² - 5x - 2 = 0
2x² + 5x + 2 = 0
D = 5² - 4 * 2 * 2 = 25 - 16 = 9 = 3²
- 2x² - 5x - 2 = - 2(x + 0,5)(x + 2)
-2(x²+2*5/4*x+(5/4)²-25/16+1)=
-2((x+5/4)²-(3/4)²)=
-2(x+5/4-3/4)(x+5/4+3/4)=
-2(x+1/2)(x+2)