bonsoir
3 x² + x - 2 = 0
Δ = 1 - 4 ( 3 * -2 ) = 1 + 24 = 5
x 1 = ( - 1 - 5 ) / 6 = - 6 /6 = - 1
x 2 = ( - 1 + 5 ) / 6 = 4 /6 = 2 /3
3 ( x + 1 ) ( x - 2 /3)
3 x² + x+ 1 = 0
Δ = 1 ² - 4 ( 3 * 1 ) = 1 - 12 = - 11
pas de solution
2 x² + 3 x + 9/8 = 0
Δ = 9 - 4 ( 2 x 9/8 ) = 9 - 72/8 = 9 - 9 = 0
Δ = 0
donc x ₀ = - 3 /4
2 ( x + 3 /4 ) ²
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bonsoir
3 x² + x - 2 = 0
Δ = 1 - 4 ( 3 * -2 ) = 1 + 24 = 5
x 1 = ( - 1 - 5 ) / 6 = - 6 /6 = - 1
x 2 = ( - 1 + 5 ) / 6 = 4 /6 = 2 /3
3 ( x + 1 ) ( x - 2 /3)
3 x² + x+ 1 = 0
Δ = 1 ² - 4 ( 3 * 1 ) = 1 - 12 = - 11
pas de solution
2 x² + 3 x + 9/8 = 0
Δ = 9 - 4 ( 2 x 9/8 ) = 9 - 72/8 = 9 - 9 = 0
Δ = 0
donc x ₀ = - 3 /4
2 ( x + 3 /4 ) ²