bonjour
- 3 x² + 4 x + 1 = 0
Δ = 4² - 4 ( - 3 * 1 ) = 16 + 12 = 28 = ( 2 √7)²
x 1 = ( - 4 - 2 √7) / - 6 = 2 + √7 / 3
x 2 = ( - 4 + 2 √7) / - 6 = 2 - √7 / 3
x² - 6 x + 5 = 0
Δ= 36 - 4 ( 1 * 5 ) = 36 - 20 = 16 = 4²
x 1 = ( 6 - 4 ) / 2 = 4/2 = 2
x 2 = ( 6 + 4 ) /2 = 10 /2 = 5
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bonjour
- 3 x² + 4 x + 1 = 0
Δ = 4² - 4 ( - 3 * 1 ) = 16 + 12 = 28 = ( 2 √7)²
x 1 = ( - 4 - 2 √7) / - 6 = 2 + √7 / 3
x 2 = ( - 4 + 2 √7) / - 6 = 2 - √7 / 3
x² - 6 x + 5 = 0
Δ= 36 - 4 ( 1 * 5 ) = 36 - 20 = 16 = 4²
x 1 = ( 6 - 4 ) / 2 = 4/2 = 2
x 2 = ( 6 + 4 ) /2 = 10 /2 = 5