Solve the system of equations.y=−30x+17y=x2−38x−31Write the coordinates in exact form. Simplify all fractions and radicals.(______,______)(______,______)
Q. Solve the system of equations.y=−30x+17y=x2−38x−31Write the coordinates in exact form. Simplify all fractions and radicals.(______,______)(______,______)
Set Equations Equal: We have the system of equations:y=−30x+17y=x2−38x−31To find the intersection points, we set the two equations equal to each other.−30x+17=x2−38x−31
Rearrange and Solve: Rearrange the equation to bring all terms to one side and set it equal to zero to find the standard form of a quadratic equation.x2−38x−31+30x−17=0x2−8x−48=0
Factor Quadratic Equation: Factor the quadratic equation to find the values of x. In quadratic equation ax2+bx+c, the factors are of the form (x+m)(x+n), where b is the sum and c is the product of m and n respectively. x2−8x−48=0 We look for two numbers that multiply to −48 and add up to −8. These numbers are ax2+bx+c0 and ax2+bx+c1. ax2+bx+c2
Solve for x: Solve for x by setting each factor equal to zero.(x−12)=0 or (x+4)=0x=12 or x=−4
Find y-Values: Find the corresponding y-values for each x-value by substituting back into one of the original equations. We can use y=−30x+17.For x=12:y=−30(12)+17y=−360+17y=−343For x=−4:y=−30(−4)+17y=120+17y=137
Write Coordinates: Write the coordinates in exact form.The first coordinate is (12,−343).The second coordinate is (−4,137).
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