Question

Qual o valor de delta para a equação -x²+2x+3=0

Answer 1

$\LARGE\tt{} - {x}^{2} + 2x + 3 = 0 \\ \LARGE\tt{}a = - 1 \\\LARGE\tt{}b = 2 \\ \LARGE\tt{}c = 3 \\ \\ \\ \LARGE\tt{}\Delta = {b}^{2} - 4 \times a \times c \\ \\ \LARGE\tt{}\Delta = {2}^{2} - 4 \times \left( - 1\right) \times 3 \\ \LARGE\tt{}\Delta = 4 - 4 \times \left( - 1\right) \times 3 \\ \LARGE\tt{}\Delta = 4 + 12 \\ \LARGE\tt{}\Delta = 16$

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