Question

If a = -3, find the value of
a) 2a
b) a^2
c) 3a^2

Answer 1

`\textbf{a)}\\\\2a=2(-3) = -6\\\\\textbf{b)}\\\\a^2 = (-3)^2 = 9\\\\\textbf{c)}\\\\3a^2 = 3(-3)^2 = 3 \cdot 9 = 27`

Answer 2

a) -6

b) 9

c) 27

Explanation:

`2( - 3) = - 6 \\ { - 3}^(2) = - 9 \\ 3 {( - 3)}^(2) = 27`