Uh-Oh! That’s all you get for now. We would love to personalise your learning journey. Sign Up to explore more. Sign Up or Login Skip for now Uh-Oh! That’s all you get for now. We would love to personalise your learning journey. Sign Up to explore more. Sign Up or Login Skip for now Solve the equation 5x2 – 3x – 4 = 0 and give your answer correct to 3 significant figures: We have 5x2 – 3x – 4 = 0 x = `(-b ± sqrt(b^2 - 4ac))/(2a)` = `(3 ± sqrt(9 + 4 xx 5 xx 4))/(2 xx 5)` = `(3 ± sqrt(89))/(10)` `x = (3 + 9.43)/(10) or x = (3 - 9.43)/(10)` ⇒ `x = (12.43)/(10) or x = (-6.43)/(10)` Concept: Quadratic Equations Is there an error in this question or solution? Solve the following equation and give your answer correct to 3 significant figures: 5x² – 3x – 4 = 0 Consider the given equation Using quadratic formula, we have `x = (-b +- sqrt(b^2 - 4ac))/(2a)` `=> x = (-(-3) +- sqrt((-3)^2 - 4 xx 5 xx (-4)))/(2 xx5)` `=> x = (3 +- sqrt(9 + 80))/(2xx5)` `=> x = (3 +- sqrt89)/10` `=> x = 1.243 or x = -0.643` Concept: Quadratic Equations Is there an error in this question or solution? |