Q. Solve the equation 6x2+9x−7=−2 to the nearest tenth.Answer: x=
Set Equation to Zero: First, we need to set the equation to zero by adding 2 to both sides.6x2+9x−7=−26x2+9x−7+2=06x2+9x−5=0
Factor or Use Quadratic Formula: Next, we will attempt to factor the quadratic equation, but if it is not factorable, we will use the quadratic formula. The quadratic formula is x=2a−b±b2−4ac, where a=6, b=9, and c=−5.
Calculate Discriminant: Calculate the discriminant b2−4ac to determine if there are real solutions.Discriminant = 92−4(6)(−5)Discriminant = 81+120Discriminant = 201Since the discriminant is positive, there are two real solutions.
Apply Quadratic Formula: Now, apply the quadratic formula to find the solutions for x.x=2⋅6−9±201x=12−9±201
Calculate Solutions: Calculate the two solutions for x. First solution: x=12−9+201 x≈12−9+14.177 x≈125.177 x≈0.431
Second solution: x=12−9−201 x≈12−9−14.177 x≈12−23.177 x≈−1.931
Round both solutions to the nearest tenth. First solution: x≈0.4 Second solution: x=12−9+2010
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