Question:
Multiply:
(0.8a − 0.5b) by (1.5a − 3b)
Solution:
To multiply, we will use distributive law as follows:
(0.8a − 0.5b) by (1.5a − 3b)
$=0.8 a(1.5 a-3 b)-0.5 b(1.5 a-3 b)$
$=1.2 a^{2}-2.4 a b-0.75 a b+1.5 b^{2}$
$=1.2 a^{2}-3.15 a b+1.5 b^{2}$
Thus, the answer is $1.2 a^{2}-3.15 a b+1.5 b^{2}$.
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