Why is (a - b) ^ 2 = a ^ 2 - 2ab + b ^ 2 also an expansion of a perfect square ? doch algebraic eypression

There's no deep meaning behind the equality you're asking about, it's just the result of a computation:

answer: since the question is talking about growth you have to use the growth formula which is inital amount (1 + growth)^time

step-by-step explanation:

the intial amount is 1200, the growth is 4.8, and the time is 7. plug those numbers into the equation, also i think you have to change 4.8 into a percent. but, i have forgotton how to do that. if this is a online class go on to the lesson.