Question

X²+4x=12

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Answer 1

Răspuns:

Explicație pas cu pas:

x^2 + 4x = 12

x^2 + 4x - 12 = 0

a = 1

b = 4

c = -12

Δ =  b² - 4ac = 16 - 4×1×(-12) = 16 + 48 = 64

x1 = (-b + √Δ)/2a = (- 4 + 8) / 2 = 4/2 = 2

x2 = (-b - √Δ)/2a = (-4 - 8) / 2 = - 12/2 = - 6

x = { - 6; 2}

Answer 2

x^2+4x-12=0

delta=b^2-4ac=16+48=64

x1=(-b+Vdelta)/2a=(-4+8)/2=4/2=2

x2=(-b-Vdelta)/2a=(-4-8)/2= -12/2= -6

x={-6,2}