Question

Classifique as equações do 2º grau em completa ou incompleta: a) 4x² - 8x + 1 = 0 b) 3x² - 2x -1 = 0 c) 5x² - 3x - 2 = 0 d) 5x² - 1 = 0 e) x² - 12x = 0

Answer 1

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A) 4x² - 8x + 1 = 0

a = 4,b = -8,c = 1

Completa

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B) 3x² - 2x - 1 = 0

a = 3,b = -2,c = -1

Completa

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C) 5x² - 3x - 2 = 0

a = 5,b = -3,c = -2

Completa

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D) 5x² - 1 = 0

a = 5,b = 0,c = -1

Incompleta

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E) x² - 12x = 0

a = 1,b = -12,c = 0

Incompleta

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Answer 2

$\large\boxed{\begin{array}{l} \rm \: a) \: 4x {}^{2} - 8x + 1 = 0 \begin{cases} \rm \: a = 4 \\ \rm \: b = - 8 \\ \rm \: c = 1\end{cases} \\ \\ \huge\boxed{ \sf{completa}} \checkmark\end{array}}$

$\large\boxed{\begin{array}{l} \rm \: b) \: 3x {}^{2} - 2x - 1 = 0 \begin{cases} \rm \: a = 3 \\ \rm \: b = - 2 \\ \rm \: c = - 1\end{cases} \\ \\ \huge \boxed{ \sf{completa}} \checkmark\end{array}}$

$\large\boxed{\begin{array}{l} \rm \: c) \: 5x {}^{2} - 3x - 2 = 0 \begin{cases} \rm \: a = 5 \\ \rm \: b = - 3 \\ \rm \: c = - 2 \end{cases} \\ \\ \huge \boxed{ \sf{completa}} \checkmark\end{array}}$

$\large\boxed{\begin{array}{l} \rm \: d) \: 5x {}^{2} - 1 = 0 \begin{cases} \rm \: a = 5 \\ \rm \: b = 0 \\ \rm \: c = - 1\end{cases} \\ \\ \huge \boxed{ \sf{incompleta}}\ \checkmark\end{array}}$

$\large\boxed{\begin{array}{l} \rm \: e) \: x {}^{2} - 12x = 0 \begin{cases} \rm \: a = 1 \\ \rm \: b = - 12 \\ \rm \: c = 0 \end{cases} \\ \\ \huge \boxed{ \sf{incompleta}} \checkmark\end{array}}$