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7. Use the discriminant to determine how many real number solutions exist for the quadratic equati...
10 months ago
Q:
7. Use the discriminant to determine how many real number solutions exist for the quadratic equation β4j2 + 3j β 28 = 0.
Accepted Solution
A:
[tex]\bf \begin{array}{llccll} y=&{{ -4}}j^2&{{ +3}}j&{{ -28}}\\ &~\uparrow &\uparrow &\uparrow \\ &~a&b&c \end{array} \\\\\\ discriminant\implies b^2-4ac= \begin{cases} 0&\textit{one solution}\\ positive&\textit{two solutions}\\ negative&\textit{no solution} \end{cases}[/tex]
so.. check what value the discriminant is then.