Solve using the quadratic formula.2j2−8j−4=0Write your answers as integers, proper or improper fractions in simplest form, or decimals rounded to the nearest hundredth.j=_____ or j=_____
Q. Solve using the quadratic formula.2j2−8j−4=0Write your answers as integers, proper or improper fractions in simplest form, or decimals rounded to the nearest hundredth.j=_____ or j=_____
Identify coefficients: Identify the coefficients of the quadratic equation.The quadratic equation is in the form of aj2+bj+c=0. For the equation 2j2−8j−4=0, the coefficients are:a = 2b = −8c = −4
Substitute into formula: Substitute the coefficients into the quadratic formula.The quadratic formula is j=2a−b±b2−4ac. Substituting the values we get:j=2⋅2−(−8)±(−8)2−4⋅2⋅(−4)j=48±64+32
Simplify square root: Simplify the expression under the square root.Calculate the value inside the square root:64+32=96
Simplify quadratic formula: Simplify the quadratic formula.Now we have:j=48±96Since 96 can be simplified to 46, we can further simplify the expression:j=48±46j=2±6
Calculate possible solutions: Calculate the two possible solutions for j. We have two solutions based on the ± sign in the formula: j=2+6 or j=2−6
Round to nearest hundredth: Round the values of j to the nearest hundredth, if required.j=2+6≈2+2.45≈4.45j=2−6≈2−2.45≈−0.45
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