Question
Copy and complete the following multi-plication:
$2a - b + 3c$
$\times 2a - 4b$
$2a - b + 3c$
$\times 2a - 4b$
✓
Answer
$2a - b + 3c$
$\times 2a - 4b$
$4a2 - 2ab + 6ac$
$- 8ab + 4b^2 - 12bc$
$4a^2 - 10ab + 6ac + 4b^2 - 12bc$
$\times 2a - 4b$
$4a2 - 2ab + 6ac$
$- 8ab + 4b^2 - 12bc$
$4a^2 - 10ab + 6ac + 4b^2 - 12bc$
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