Why is it necessary to learn how to factor if you can just use the quadratic formula to solve quadratic equations?

I need the answer to 2/3 - 1/10. What is it?

For a trip, one high school rented and filled 2 vans and 9 buses with 245 students. Another high school instead fit it's 155 students into 3 vans and 5 buses.

Let A={2, 4, 6, 8} and B={2, 3, 5, 7, 9} compute n (A)

Gad has 15 trading cards that he wants to give to 5 friends. He wants each friend to have the same number of trading cards. Select the three statements that describe how Gad should give the trading cards to his friends.

What is the solution to 6y - (2y-5) = 29

What is the lenth of 10

What is factor give 63

A number is shown in word form. "Three hundred thirteen thousand, one-hundred sixty" What is the number in expanded form?

2.80=9 (70) / I. I need a answer for i

What is the answer to f (x) = √x-3