Answer:
a = 24/11
Step-by-step explanation:
use foil method
divide each element of the column to another column
so basically, it'll be like
(a • 9) + (a • 2) + (-2 • 9) + (-2 • 2)
note:
negative • negative = positive
positive • positive = positive
negative • positive = negative
positive • negative= negative
solve, then you'll get
9a + 2a - 18 - 4
Note:
don't forget to include their respective sign, positive negative
9a + 2a - 18 - 4
= 11a - 24
solving for a
11a - 24 = 0
transpose -24 to other side of the paragraph
note:
AS YOU TRANSPOSE an element to the other side of the paragraph, it becomes its opposite sign. negative becomes positive, and positive becomes negative.
11a = 24
divide bothe sides by 11 to simplify "a"
11a ÷ 11 = 24 ÷ 11
a = 24/11
