Question

1. Solve by completing the square

4r^2 - 28r = -9

2. Use the discriminant to find the number of unique real solutions.

3. Solve with the quadratic formula.

Answer 1

wat did u get for number 1?

Answer 2

I didn't solve it, not sure how.

Answer 3

well first we rearrange the formula to get
4r^2 - 28r = -9
4r^2 - 28r + 9 = 0
and from here u factorize the equation

Answer 4

do u know how to factorize an equation or do u want me to teach u how?

Answer 5

not sure how, please teach me. I'm horrible with math

Answer 6

ok ill do it and ill explan wat i did after i finish

Answer 7

Alright, thank you. I appreciate it.

Answer 8

4r^2 - 28r + 9 = 0
4(r^2 - 7r) +9
\[4(r - \frac{ 7 }{ 2 })^{2} + 9 - 4(\frac{ 7 }{ 2 })^{2}\]
\[4(r - \frac{ 7 }{ 2 })^{2} + 9 - 4(\frac{ 49 }{ 4 })\]
\[4(r - \frac{ 7 }{ 2 })^{2} + 9 - 49 \]
\[4(r - \frac{ 7 }{ 2 })^{2} - 40\]

Answer 9

ok i need u to be here and focus, u there?

Answer 10

Yes.

Answer 11

sry im back my internet was giving trouble, u there again?