Q. Which equation has the same solution as x2−19x−8=2 ?(x−9.5)2=−80.25(x+9.5)2=100.25(x+9.5)2=−80.25(x−9.5)2=100.25
Simplify Equation: Simplify the given equation by moving all terms to one side to set the equation equal to zero.x2−19x−8−2=0x2−19x−10=0
Find Vertex Form: Find the vertex form of the quadratic equation. The vertex form is given by (x−h)2=k, where (h,k) is the vertex of the parabola.To find h, use the formula h=−b/(2a), where a is the coefficient of x2 and b is the coefficient of x.In this case, a=1 and b=−19, so (h,k)0.
Calculate Vertex Coordinates: Calculate the value of k by substituting h back into the original equation.k=(9.5)2−19(9.5)−10k=90.25−180.5−10k=−90.25−10k=−100.25
Write Vertex Form Equation: Write the equation in vertex form using the values of h and k.(x−9.5)2=−100.25
Compare with Choices: Compare the vertex form equation with the given choices to find the one that matches.The correct choice is (x−9.5)2=−100.25, which is not listed among the choices provided. However, if we add 100.25 to both sides of the equation, we get:(x−9.5)2+100.25=0(x−9.5)2=−100.25
Correct Mistake: Realize that there has been a mistake in the previous step. The correct step should be to add 100.25 to both sides of the equation to get:(x−9.5)2=100.25This matches one of the given choices.