Valor de discriminante (6-24ac)

Ecuaciones
3x² +16x+5=0
4x² +4x+1=0
x²+2x+5=0
5x² 8x-3=0
x² -3x-4=0
x² -6x-9=0

Soluciones
X1= X²
X1= X²
X1= X²
X1= X²

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Astudent draws two parabolas both parabolas cross the x axis at (-4,0) and (6,0) the y intercept of the first parabolas is (0,-12). the y intercept of the second parabola is (0,-24) what is the positive difference between the a values for the two functions that describe the parabolas

Cole says the distance between points (-5,0) and (0,-5)is 5 units. is he correct? explain why or why not.

Arandomized controlled trial is designed to evaluate the effect of metoprolol in patients with heart failure. while preparing for statistical analysis, the researcher reviews some common types of statistical errors. which of the following statements is true regarding a type i error in a clinical study? a. the study is not significantly powered to detect a true difference between study groups. bthe null hypothesis is true but is rejected in error. c. the null hypothesis is false but is accepted in error. d. type i error is also known as beta and is usually 0.1 or 0.2. e. type i error depends on the study's confidence interval.