Question

What could be the value of C that makes r^2-9r+C a perfect square?
and the choices are
a. 9
b. 1
c. 3
d. 4

Answer 1

looks no options are right

Answer 2

i think so
'coz in my solution there were'nt answers like those above

Answer 3

the value of C should (-9/2)^2 or 81/4, right ?

Answer 4

yeah
we have the same calculations

Answer 5

except the equation for -9r changed be -6r, u get a perfectc square --"

Answer 6

yeah
so the 3 will be satistfied

Answer 7

(x+3)^2
i mean rather. . . .

Answer 8

C is 9

Answer 9

can anybody help us?
someone's whose expert than us?

Answer 10

i'm getting the same answer

Answer 11

ah k

Answer 12

so the choices are the wrong ones?

Answer 13

What should be the axis of symmetry of the quadratic function f(x)=5x^2-6?

Answer 14

y axis