$$ \large \begin{align} a(b+c) &= ab+bc \\ a(b-c) &= ab-bc \end{align} $$
Question 1
Expand \( 3(a+4) \).
\( 3(a+4) = 3a+12 \)
Question 2
Expand \( 3(a-7) \).
\( 3(a-7) = 3a-21 \)
Question 3
Expand \( -2(a+5) \).
\( -2(a+5) = -2a-10 \)
Question 4
Expand \( a(x-2) \).
\( a(x-2) = ax-2a \)
Question 5
Expand \( a(a-2) \).
\( a(a-2) = a^2-2a \)
Question 6
Expand \( 2a(a+3b) \).
\( 2a(a+3b) = 2a^2+6ab \)
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