Now we stipulate an operation, a * b = (a + b) - (a-b), where a and B are rational numbers, then what is a * B + (a + b) * (a-b) equal to? Please make it clear to me, Good point | Math enthusiast | Mathematical art

Now we stipulate an operation, a * b = (a + b) - (a-b), where a and B are rational numbers, then what is a * B + (a + b) * (a-b) equal to? Please make it clear to me, Good point

We can get a * b = (a + b) - (a-b) = 2B, which is twice of the formula after the * sign. We can take the conditional a B as x y, which is better understood
So a * B + (a + b) * (a-b) = 2B + 2 (a-b) = 2A

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