Question

solve the following equation and give your answer correct to 3 significant figures 5x^2-3x-4=0​

Answer 1

Answer:

Step-by-step explanation:

5χ²-3χ-4=0

comparing with; aΧ²+bΧ+c=0

a=5, b=-3, c=-4

using the almighty formula=±

x= $\frac{-b ±\sqrt{b²-4ac} }{2a}$

x=$\frac{-(-3)±\sqrt{(-3)^{2} -4(5)*(-4) } }{2(5)}$

x=$\frac{3+\sqrt{89} }{10}$   or  x=$\frac{3-\sqrt{89} }{10}$

∴x=1.24×10⁰