Solve the system of equations.y=x2−2x−41y=−2x−16Write the coordinates in exact form. Simplify all fractions and radicals.(______,______)(______,______)
Q. Solve the system of equations.y=x2−2x−41y=−2x−16Write the coordinates in exact form. Simplify all fractions and radicals.(______,______)(______,______)
Set Equations Equal: We have the system of equations:y=x2−2x−41y=−2x−16To find the intersection points, we set the two equations equal to each other.x2−2x−41=−2x−16
Simplify and Rearrange: Simplify the equation by adding 2x and 16 to both sides to get the equation in standard quadratic form.x2−2x−41+2x+16=−2x−16+2x+16x2−25=0
Solve Quadratic Equation: Solve the quadratic equation for x.x2−25=0This is a difference of squares, which can be factored as:(x−5)(x+5)=0
Factor and Solve: Set each factor equal to zero and solve for x.(x−5)=0 or (x+5)=0x=5 or x=−5
Substitute for y: Find the corresponding y values for each x by substituting x back into one of the original equations. We'll use y=−2x−16. For x=5: y=−2(5)−16y=−10−16y=−26
Find y for x=−5: Find the y value for x=−5: y=−2(−5)−16 y=10−16 y=−6
Write Coordinates: Write the coordinates in exact form.First Coordinate: (5,−26)Second Coordinate: (−5,−6)
More problems from Solve a system of linear and quadratic equations: parabolas