Is it possible to find the unknown value in the following expression. Explain
(a+3)(a+__)=a²+10a+6
Thank you again.
No, assume $\displaystyle a=-3$ then the left hand side is 0 because $\displaystyle a+3=0$ regardless of what the missing number is it will still have to be zero. Yet, the right side would not.
Q.E.D.