Hello, how to solve for area of a square, easy 100 points

1st method:      

2nd method:

If the diagonal given:

note: the "a" refers to each side length measure and "d" diagonal

when studying polynomials, you often hear the terms zeros, roots, factors and x x the multiplicity of a zero is important because it tells us how the graph of the let's look at the graph of a function that has the same zeros

step-by-step explanation:

do you have a picture of the table