Q. Solve the equation x2+17x+40=0 to the nearest tenth.Answer: x=
Identify Equation Type: Identify the type of equation.We have a quadratic equation in the form ax2+bx+c=0, where a=1, b=17, and c=40.
Apply Quadratic Formula: Apply the quadratic formula to find the solutions for x. The quadratic formula is x=2a−b±b2−4ac. Here, a=1, b=17, and c=40.
Calculate Discriminant: Calculate the discriminant b2−4ac.Discriminant = 172−4(1)(40)=289−160=129.
Calculate Solutions: Calculate the two solutions using the quadratic formula.x=2×1−17±129x=2−17±129
Calculate First Solution: Calculate the first solution (using the positive square root).x=2−17+129x≈2−17+11.3578x≈2−5.6422x≈−2.8211Round to the nearest tenth: x≈−2.8
Calculate Second Solution: Calculate the second solution (using the negative square root).x=2−17−129x≈2−17−11.3578x≈2−28.3578x≈−14.1789Round to the nearest tenth: x≈−14.2
More problems from Solve exponential equations using logarithms