Question

Rsquare+R-20

Answer 1

=0?

Answer 2

When you have the product (R + number1)(R _ number2),
you end up with Rsquare + (number 1)*R + (number2)*R + (number1)(number2).

Going in reverse, we want to factor 20 to get number1 and number 2.
What are the factors of 20? Remember that there's a negative 20,
so one of the factors will be negative.
-1 * 20, 1 * (-20), 2 * (-10), ...
Which pair of factors adds to 1, the coefficient of R.

Answer 3

FACTOR