Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$\frac{ { 4.5 }^{ 2 } - { 1.5 }^{ 2 } }{ 0.3 \times 0.5-0.3 }$$

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