Given \( 2 m x^{2}=3 x-8 \) where \( m \neq 0 \). Determine the value(s) of \( m \) for which the roots of the equation are non-real. Given that \( f(x)=x^{2}-p x+8+2 p \) has two equal root and \( p<0 \). determine the coodinates of the turning point, \( h(x)=f(x)-3 \).
Real Tutor Solution
Answer
Solution
Sign in to Unlock Answers for Free!
A Learning Platform Trusted by Millions of Real Students and Teachers.
Reviewed and approved by the UpStudy tutoring team
The Deep Dive
To determine when the roots of the equation \( 2m x^2 = 3x - 8 \) are non-real, we can begin by rewriting it in standard form: \( 2m x^2 - 3x + 8 = 0 \). For the roots to be non-real, the discriminant must be less than zero. The discriminant \( D \) is given by: \[ D = b^2 - 4ac = (-3)^2 - 4(2m)(8) = 9 - 64m \] Setting the discriminant less than zero gives: \[ 9 - 64m < 0 \implies 64m > 9 \implies m > \frac{9}{64}. \] Now, for the function \( f(x) = x^2 - px + 8 + 2p \) to have two equal roots, the discriminant must equal zero: \[ D_f = p^2 - 4(1)(8 + 2p) = 0. \] Expanding this gives: \[ p^2 - 32 - 8p = 0 \implies p^2 + 8p - 32 = 0. \] Using the quadratic formula, we can find \( p \): \[ p = \frac{-8 \pm \sqrt{(8)^2 + 4 \cdot 32}}{2} = \frac{-8 \pm \sqrt{64 + 128}}{2} = \frac{-8 \pm 12}{2}. \] This results in two values: \[ p = 2 \text{ and } p = -10. \] Since \( p < 0 \), we choose \( p = -10 \). Now we substitute \( p = -10 \) back into the function to find the turning point. The turning point occurs at \( x = \frac{p}{2} = \frac{-(-10)}{2} = 5 \). Next, substituting \( x = 5 \) into \( f(x) \): \[ f(5) = 5^2 - (-10)5 + 8 + 2(-10) = 25 + 50 + 8 - 20 = 63. \] So, the coordinates of the turning point are \( (5, 63) \). Finally, to find the turning point of \( h(x) = f(x) - 3 \), we adjust the \( y \)-coordinate by shifting down 3 units. So, the new coordinates will be: \[ (5, 63-3) = (5, 60). \] Thus, the coordinates of the turning point of \( h(x) \) are \( (5, 60) \).