Solve by completing the square.r2+26r=−29Write your answers as integers, proper or improper fractions in simplest form, or decimals rounded to the nearest hundredth.r= _____ or r= _____
Q. Solve by completing the square.r2+26r=−29Write your answers as integers, proper or improper fractions in simplest form, or decimals rounded to the nearest hundredth.r= _____ or r= _____
Write Equation Form: Write the equation in the form of r2+br=c. We have the equation r2+26r=−29.
Move Constant Term: Move the constant term to the right side of the equation.Add 29 to both sides to isolate the r terms on the left.r2+26r+29=0
Find Completing Number: Find the number to complete the square.Take half of the coefficient of r, which is 26, and square it. (26/2)2=132=169.
Add/Subtract Completing Number: Add and subtract the number found in Step 3 to the left side of the equation.r2+26r+169−169=29
Factor Perfect Square Trinomial: Factor the perfect square trinomial on the left side of the equation. (r+13)2−169=29
Move Constant Term Right: Move the constant term to the right side to set up for taking the square root.(r+13)2=29+169(r+13)2=198
Take Square Root: Take the square root of both sides of the equation.(r+13)2=±198r+13=±198
Solve for r: Solve for r by subtracting 13 from both sides.r=−13±198
Simplify Square Root: Simplify the square root and round to the nearest hundredth if necessary.198≈14.07r=−13±14.07
Find Two Values: Find the two values of r.r≈−13+14.07 implies r≈1.07.r≈−13−14.07 implies r≈−27.07.Values of r: 1.07, −27.07
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