Question

me expliquem equacao de 2grau incompleta

Answer 1

ax² + bx + c = 0

Incompleta: falta coeficiente para b = 0
                    falta coeficiente para c = 0
a)

ax² + c = 0

2x² - 32 = 0
a = 2; b = 0; c = - 32  (b = 0) incompleta

2x² - 32 = 0
2x² = 32
x² = 32/2
x² = 16
x = √16
x = + 4 e x = - 4
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b)

ax² + bx = 0

2x² + 4x = 0
a = 2; b = 4; c = 0  (incompleta)

2x² + 4x = 0
x.(2x + 4) = 0

x = 0

2x + 4 = 0
2x = - 4
x = - 4/2
x = - 2

R.: x = 0 e x = - 2