Question 27

If $$a\times b=2a- 3b+ab$$, then $$3\times 5+5\times 3$$ is equal to

Solution

$$aXb=2a- 3b+ab$$

$$3X5=2\times3-3\times5+3\times5=6$$

$$5X3=2\times5-3\times3+5\times3=16$$

$$3X5+5X3=6+16=22$$

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