Question
Find the following product:
$(x-6)(4 x+9)$
$(x-6)(4 x+9)$
✓
Answer
$(x-6)(4 x+9)$
$=x(4 x+9)-6(4 x+9)$
$=(x \times 4 x+x \times 9)-(6 \times 4 x+6 \times 9)$
$=4 x^2+9 x-24 x-54$
$=4 x^2-15 x-54$
$=x(4 x+9)-6(4 x+9)$
$=(x \times 4 x+x \times 9)-(6 \times 4 x+6 \times 9)$
$=4 x^2+9 x-24 x-54$
$=4 x^2-15 x-54$
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