Question

how do you do y^2 - 28 = 0 using the square root property of equality

Answer 1

Square Root Property of Equality:
If y^2 = a, then sqrt{y^2) = sqrt{a}. On the left side, the sqrt and square are inverses of each other so they cancel. On the right side, sqrt{a} = + or - sqrt{a}

For example, if y^2 = 4, then sqrt{y^2} = sqrt{4}, which becomes y = + or - 2

Answer 2

where does the "a" come from?

Answer 3

It's a general case

Answer 4

a means any number