Question

3x²+12x=0
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Answer 1

Explicación paso a paso:

Formula:    x=-b±√b²-4ac/2a

x²-15x=0

x=-(-15)±√(-15)²-4(1)(0)/2(1)

x=15±√(225)-(4)(0)/2

x=15±√(225)-(0)/2

x=15±√225/2

x=15±15/2

x₁=15+15/2 = 30/2 = 15

x₂=15-15/2 = 0/2 = 0

x₁ = 15

x₂ = 0

3x²+12x=0

x=-(12)±√(12)²-4(3)(0)/2(3)

x=-12±√(144)-(12)(0)/6

x=-12±√(144)-0/6

x=-12±√144/6

x=-12±12/6

x₁=-12+12/2 = 0/2 = 0

x₂=-12-12/2 = -24/2 = -12

x₁ = 0

x₂ = -12