B)work out the probably that the number is in the set AnB

James adds two numbers a + b. sally adds the same two numbers but reverse the order b + a what property of addition assures us that james and sally will get the same sum

Which shows one way to determine the factors of 4x3 + x2 – 8x – 2 by grouping?

If 2(a^2+b^2)=(a+b)^2 then, > a+b=0, > ab=0, > a=b, > 2a=b