Solve by completing the square.f2−20f=41Write your answers as integers, proper or improper fractions in simplest form, or decimals rounded to the nearest hundredth.f= _____ or f= _____
Q. Solve by completing the square.f2−20f=41Write your answers as integers, proper or improper fractions in simplest form, or decimals rounded to the nearest hundredth.f= _____ or f= _____
Rewrite and Subtract: Rewrite the equation in the form of f2+bf=c.Subtract 41 from both sides to set the equation to zero.f2−20f−41=0
Complete the Square: Choose the equation after completing the square.Since (−220)2=100, add 100 to both sides to complete the square.f2−20f+100=41+100f2−20f+100=141
Factor and Identify: Identify the equation after factoring the left side.f2−20f+100=141(f−10)2=141
Take Square Root: Identify the equation after taking the square root on both sides.Take the square root of both sides of the equation.(f−10)2=141f−10=±141
Isolate Variable: Choose the equation after isolating the variable f. To isolate f, add 10 to both sides of the equation. f−10+10=±141+10f=10±141
Calculate Approximate Values: Calculate the approximate values of f, rounding to the nearest hundredth.f≈10+141 and f≈10−141f≈10+11.87 and f≈10−11.87f≈21.87 and f≈−1.87
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