How many solutions does this have:

Question

x^2 + 2x + 1 = 0

I put one.

9x^2 + 49 = 42x

I put one.

x^2 + 4x + 1 = 0

I put two.

Answer 1

I actually think the 2nd one has no real solutions...

Answer 2

nah, you are correct on all three

9x^2 - 42x + 49 = 0
(3x-7)^2 = 0

Answer 3

Ok cool! you think you can show me how to do these?
1. What is the largest output value of f(x) possible for the following quadratic function? f(x) = - x 2 -6 x + 15.

2. What is the absolute value of the smallest output value of f(x) possible for the following quadratic function? f(x) = x 2 – 2 x - 8

Answer 4

as you know, the vertex of the parabola

y = ax^2 + bx + c

is at x = -b/2a

#1 the parabola opens down, so the vertex is a maximum
#2 has a minimum at the vertex

so, plug in that value for x and let 'er rip

Answer 5

I have no idea what any of that means... :)