Question

Factor the expression below.

x2 - 18x+81
O A. (x - 3)(x - 27)
O B. (x+9)(x+9)
O C. (x+3)(x+ 27)
O D. (x - 9)(x-9)

Answer 1

Answer:B (x+9)(x+9)

Step-by-step explanation: just did it and (x-9)(x-9) is the WRONg answer. the correct answer is B (x+9)(x+9)

Answer 2

You must remember that a polynomial is written like so...

ax^2 + bx + c

In this case...

a = 1

b = -18

c = 81

To factor you must find two numbers who both add up to b (-18) AND multiply to c (81)

-9 + -9 = -18

-9 * -9 = 81

so...

D. (x - 9)(x - 9)

Hope this helped!

~Just a girl in love with Shawn Mendes