Solve using the quadratic formula.2q2−4q−9=0Write your answers as integers, proper or improper fractions in simplest form, or decimals rounded to the nearest hundredth.q=_____ or q=_____
Q. Solve using the quadratic formula.2q2−4q−9=0Write your answers as integers, proper or improper fractions in simplest form, or decimals rounded to the nearest hundredth.q=_____ or q=_____
Identify values of a, b, and c: Identify values of a, b, and c in the equation 2q2−4q−9=0.a=2, b=−4, c=−9.
Plug into quadratic formula: Plug a, b, and c into the quadratic formula q=2a−b±b2−4ac.q=2⋅2−(−4)±(−4)2−4⋅2⋅(−9).
Simplify and calculate: Simplify inside the square root and the constants outside.q=44±16+72.q=44±88.
Simplify square root and reduce: Simplify the square root (if possible) and reduce the fraction.88 simplifies to 222.q=44±222.q=1±0.522.
Calculate two possible solutions: Calculate the two possible solutions for q.q=1+0.522 or q=1−0.522.
Round to nearest hundredth: Round the values of q to the nearest hundredth, if required.q≈1+0.5×4.69 or q≈1−0.5×4.69.q≈1+2.345 or q≈1−2.345.q≈3.35 or q≈−1.35.
More problems from Solve a quadratic equation using the quadratic formula