Solve by completing the square.y2−16y−33=0Write your answers as integers, proper or improper fractions in simplest form, or decimals rounded to the nearest hundredth.y= _____ or y= _____
Q. Solve by completing the square.y2−16y−33=0Write your answers as integers, proper or improper fractions in simplest form, or decimals rounded to the nearest hundredth.y= _____ or y= _____
Rewrite equation in standard form: Rewrite the equation in the form of y2+by=c. Add 33 to both sides to set the equation up for completing the square. y2−16y−33+33=0+33y2−16y=33
Complete the square: Choose the number to add to both sides to complete the square.Since (−216)2=64, add 64 to both sides.y2−16y+64=33+64y2−16y+64=97
Factor left side: Factor the left side of the equation.y2−16y+64=97(y−8)2=97
Take square root: Take the square root of both sides of the equation.(y−8)2=97y−8=±97
Solve for y: Solve for y by adding 8 to both sides of the equation.y−8+8=±97+8y=8±97
Calculate decimal values: Calculate the approximate decimal values of y, rounded to the nearest hundredth.y≈8+97 implies y≈8+9.85 which is y≈17.85.y≈8−97 implies y≈8−9.85 which is y≈−1.85.Values of y: 17.85, −1.85
More problems from Solve a quadratic equation by completing the square