Solve using the quadratic formula.3u2−3u−3=0Write your answers as integers, proper or improper fractions in simplest form, or decimals rounded to the nearest hundredth.u=_____ or u=_____
Q. Solve using the quadratic formula.3u2−3u−3=0Write your answers as integers, proper or improper fractions in simplest form, or decimals rounded to the nearest hundredth.u=_____ or u=_____
Identify values: Identify the values of a, b, and c in the quadratic equation3u2−3u−3=0. The quadratic equation is in the form au2+bu+c=0. For our equation, a=3, b=−3, and c=−3.
Substitute in quadratic formula: Substitute the values of a, b, and c into the quadratic formula to find u. The quadratic formula is u=2a−b±b2−4ac. Substituting the values we get: u=2⋅3−(−3)±(−3)2−4⋅3⋅(−3)
Simplify discriminant: Simplify the expression under the square root (the discriminant). (−3)2−4⋅3⋅(−3)=9+36=45
Continue simplifying formula: Continue simplifying the quadratic formula with the discriminant.u=63±45Since 45 can be simplified to 35, we can rewrite the expression as:u=63±35
Divide numerator by 3: Simplify the expression further by dividing both terms in the numerator by 3.u=21±5
Identify possible values: Identify the two possible values for u.u=21+5 or u=21−5
Round if necessary: If necessary, round the values of u to the nearest hundredth.u=21+5≈21+2.24≈23.24≈1.62u=21−5≈21−2.24≈2−1.24≈−0.62
More problems from Solve a quadratic equation using the quadratic formula