Algebra: Expansion Flashcards
1
Q
What is the distributive law?
A
a(b+c) = ab + ac
2
Q
In the expression 12(x+18), what do we call the number 12?
A
12 is the coefficient of the number in brackets (or parentheses).
3
Q
(a + b)(c + d) =
A
(ac + ad + bc + bd)
4
Q
(a + b)(a - b) =
A
a2-b2
5
Q
(a + b)2 =
A
a2 + 2ab + b2
