Answer:
x4+7x+3
Step-by-step explanation:
Answer:
a = - 3
Step-by-step explanation:
The equation has common factors x(x + 3) on both sides
For the 2 sides of the equation to be equal, then the factor
(x + a) = (x - 3) and by comparison
a = - 3
1,000,000 + 300,000 + 50,000 + 4,000 + 300 + 20 +7
