Please answer using things like ~Elim;1-2

What is the missing constant term in the perfect square that starts with x^2 -20x

Follow these steps using the algebra tiles to solve the equation −5x + (−2) = −2x + 4. 1. add 5 positive x-tiles to both sides and create zero pairs. 2. add 4 negative unit tiles to both sides and create zero pairs. 3. divide the unit tiles evenly among the x-tiles. x =

The longer leg of a 30° 60° 90° triangle is 16 times square root of three how long is a shorter leg