Solve using the quadratic formula.8w2−9w−4=0Write your answers as integers, proper or improper fractions in simplest form, or decimals rounded to the nearest hundredth.w=_____ or w=_____
Q. Solve using the quadratic formula.8w2−9w−4=0Write your answers as integers, proper or improper fractions in simplest form, or decimals rounded to the nearest hundredth.w=_____ or w=_____
Identify coefficients: Identify the coefficients a, b, and c in the quadratic equation8w2−9w−4=0.a=8, b=−9, c=−4
Write quadratic formula: Write down the quadratic formula: w=2a−b±b2−4ac.
Substitute values: Substitute the values of a, b, and c into the quadratic formula.w=2⋅8−(−9)±(−9)2−4⋅8⋅(−4)
Simplify equation: Simplify the equation by calculating the discriminant b2−4ac.Discriminant = (−9)2−4⋅8⋅(−4) = 81+128 = 209
Insert discriminant: Insert the discriminant back into the quadratic formula. w=169±209
Calculate solutions: Calculate the two possible solutions for w.w=169+209 or w=169−209
Round values: Round the values of w to the nearest hundredth, if necessary.w≈(9+14.456)/16 or w≈(9−14.456)/16w≈23.456/16 or w≈−5.456/16w≈1.47 or w≈−0.34
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