Solve the equation by completing the square. 0 = 4x2 − 72x A. x = 0, 18 B. x = -72, 90 C. x = -90, 72 D. x = -18, 0

A. x = 0, 18

Step-by-step explanation:

Step 1: GCF

4(x² - 18x) = 0

x² -18x = 0

Step 2: Complete the Square

x² -18x + 81 = 0 + 81

(x - 9)² = 81

Step 3: Solve

√(x - 9)² = √81

x - 9 = ±9

x = 9±9, or x = 0, 18

And we have our answers!

A. x = 0, 18

Step-by-step explanation:

0 = 4x2 − 72x

4x^2 - 72x = 0

x^2 - 18x = 0

x^2 - 18x + 81 = 81

(x - 9)^2 = 81

x - 9 = 9   or   x - 9 = -9

x = 18   or   x = 0

A. x = 0, 18

to find the total number of combinations, multiply the quantity of each item by each other:

2 pairs of shoes x 3 pairs of shorts = 6 different combinations.

answer: 80,000

step-by-step explanation:

the population doubles every day.

10,000*2=20,000 day 4

20,000*2=40,000 day 5

40,000*2=80,000 day 6