Solve the system of equations.y=x2+21x−4y=22x+26Write the coordinates in exact form. Simplify all fractions and radicals.(______,______)(______,______)
Q. Solve the system of equations.y=x2+21x−4y=22x+26Write the coordinates in exact form. Simplify all fractions and radicals.(______,______)(______,______)
Set Equations Equal: Set the two equations equal to each other since they both equal y. This gives us x2+21x−4=22x+26.
Rearrange and Simplify: Rearrange the equation to set it to zero. Subtract 22x+26 from both sides to get x2+21x−4−22x−26=0. This simplifies to x2−x−30=0.
Factor Quadratic Equation: Factor the quadratic equationx2−x−30. The factors of −30 that add up to −1 are −6 and +5. So the equation factors to (x−6)(x+5)=0.
Solve for x: Solve for x by setting each factor equal to zero. This gives us x−6=0 and x+5=0. Solving these gives us x=6 and x=−5.
Substitute x Values: Substitute x=6 into one of the original equations to find the corresponding y value. Using y=22x+26, we get y=22(6)+26, which simplifies to y=132+26, giving us y=158.
Find Corresponding y Values: Substitute x=−5 into one of the original equations to find the corresponding y value. Using y=22x+26, we get y=22(−5)+26, which simplifies to y=−110+26, giving us y=−84.
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