Solve the quadratic by completing the square.

x^2-18x+79=0

first chose the appropriate form and fill in the blanks to the nearest hundredth. if there is more than one solution, separate them with commas.

Hey there!

x^2-18x+79=0

To complete the square, you need to take half of 18, and square it. You have to have complete squares for C for this to work.

-18/2= -9

-9^2= 81

(x^2-18x+81)-81+79=0

The factor is 9, and the -18 is negative.

(x-9)^2 -81+79=0

Add the numbers.

-81+79= -2

(x-9)^2=-2

Now, unsquare both sides.

√(x-9)^2= √-2

Negative square roots do not exist, so it is an imaginary number. Put tha tin front of the 2.

(x-9)=± i√2

x= -9±i√2 <=== the answer

I hope this helps!

~kaikers

1. d.90

2. e. none of these (80)

3. a. 0

4. b. 6

5. e. none of these (10)

6. a. 5

the multiples of 15 are 15, 30,45, 60, 75, 90, 105, 120, 135, 150, 165, 180, 195,   210, 225, 240, 255, 270, 285, 300, 315, 330, 345, 360, 375,   390, 405, 420, 435, 450, 465, 480, 495, 510, 525, 540, 555, 570, 585, 600, 615, 630, 645, 660, 675, 690, 705, 720, and 735.

the factors of 15 are 1, 3, 5, and 15.

hope that , fam!

-une, your fren : )