With 5 and 6

5)
which one of the equations has a graph with no x-intercepts?
a) y = 4x
b) y = -x2
c) y = x2 - 1
d) y = -x2 - 1
6)
devon decided to rewrite the quadratic equation so that it could be simplified into a square in order to find the zeros.

which process correctly shows devon rewriting x2 + 10x + 13 into a square?
a) (x2 + 10x + 25) + 13
(x + 5)2 +13
b) (x2 + 10x + 25) + 13 - 25
(x + 5)2 -12
c) (x2 + 10x + 100) + 13 - 100
(x + 10)2 -87
d) x =
10 ±
102 - 4(1)(13)
2