81.
A perfect square is a binomial squared, like (x+3)^2. You would calculate this by remembering: Square the first, twice the product, square the last. So x^2 (square the first), plus 6x (twice the product), plus 9 (square the last), so we get x^2+6x+9. We can factor this in reverse to see that this is a perfect square. With this simple trick, you can solve for perfect squares.
false, in order to be one 8 would have to be a square number which it is not. So the constant term in the trinomial would need to be 4, 9, 16 etc.
The square root of 27 plus the square root of 5 = 7.4322204
C Square
16
81.
49
49
38
64
144
(b/2)^2= 64
-12
48
121
c = 25 4x2 + 20x + 25 (2x + 5)(2x + 5)