Questions which equation shows the quadratic formula used correctly to solve \( 5x^2 + 3x – 4 = 0 \) for x? More Videos which equation shows the quadratic formula used correctly to solve \( 5x^2 + 3x – 4 = 0 \) for x? Equation is \( 5x^2 + 3x – 4 = 0 \) [Convert Equation to quadratic equation to find the value of x through quadratic formula] \( 5x^2 + 3x + (-4) = 0 \) [According to the Quadratic Equation a= 5, b= 3 and c=-4] Quadratic Formula \(x = {-b \pm \sqrt{b^2-4ac} \over 2a}\) [put the value of a, b, and c in the formula] => \(x = {-3 \pm \sqrt{3^2-4\times 5 \times (-4)} \over 2 \times 5}\) => \(x = {-3 \pm \sqrt{9+80} \over 10}\) => \(x = {-3 \pm \sqrt{89} \over 10}\) [ the value of \( \sqrt{89} = 9.434 \) ] => \(x = {-3 \pm 9.434 \over 10}\) => \(x = \frac{-3 – 9.434}{10} \;or\; \frac{-3 + 9.434}{10} \) => \(x = \frac{-12.434}{10} \;or\; \frac{6.434}{10} \) => \(x = -1.2434 \;or\; 0.6434 \) Related posts: Solve Equation 7×2 = 9 + X using the quadratic formula to solve \( 2x^2 = 4x – 7 \), what are the values of x? Related Topics: Up Next using the quadratic formula to solve \( x^2 + 20 = 2x \) , what are the values of x? Don't Miss using the quadratic formula to solve \( 2x^2 = 4x – 7 \), what are the values of x? Continue Reading Latest Popular Guest Post8 hours ago What is Marketing Automation? Marketing Automation Tools Guest Post2 days ago How Machine Learning Changed The Traditional Ways Of Developing A Mobile App. Guest Post3 days ago Why Email Marketing Is Important For Ecommerce Business? Difference Between7 days ago How to Compare Vagrant, Kubernetes, Mesos, and Docker? Learn7 days ago Square and Square Root Table of 1 to 100 | 100 Square Root Chart Learn7 days ago How Many Seconds in a Minutes, Hour, Day, Week, Month and Year? Learn7 days ago How Many Hours in a Day, Week, Month and Year or Leap Year? Difference Between1 week ago Difference Between Apache Spark and Apache Flink Guest Post4 weeks ago Top 12 Big Data Certifications in Demand For 2020 Difference Between4 weeks ago Node.js vs React.js: Which One Should You Opt For? Math8 months ago Average Rate Of Change Formula Made Simple Math8 months ago List of Basic Maths Formulas for Class 5 to 12 Math2 years ago Percentage Formulas | How to Calculate Percentages of a Number? Math2 years ago Surface Area of a Triangular Prism Formula & Volume of a Triangular Math2 years ago Triangular Pyramid Formula | Volume & Surface Area of a Triangular Pyramid Math2 years ago Y Intercept & X Intercept Formula | Slope Intercept Form & Equation Math2 years ago What is Integration? List of Integration by Parts Formulas Math8 months ago List of Basic Algebra Formulas for Class 5 to 12 Math2 years ago List of Pyramid Formula – Surface Area, Volume of Pyramid Math2 years ago What is (a-b)^3 Formula? a^3-b^3 Formula | (a-b)^2 | (a+b-c)^2 Advertisement