Question

Use the quadratic formula to determine the solutions for the function y = 3x2 + 6x – 144.

Answer 1

Divide through by 3 first of all to keep the numbers smaller.
Then a = 1, b = 2 and c = -48
Plug into the quadratic formula which is:

Answer 2

\[x=\frac{-b \pm \sqrt{b^2-4ac}}{2a}\]

Answer 3

how you get that

Answer 4

@amberk123 That is a formula that was developed to find solutions of equations of this form:
\[ax^2+bx+c=0\]

Answer 5

Your equation is in that form so you just need to identify a, b, and c and plug into that formula.

Answer 6

okay

Answer 7

okay

Answer 8

Divide through by 3 first of all to keep the numbers smaller.
Then a = 1, b = 2 and c = -48

Answer 9

\[x=\frac{-1\pm \sqrt{2^2-4(1)(-48)}}{2(1)}\]

Answer 10

\[x=\frac{ -6 \pm \sqrt{6^{2}-4(3)(144)}}{ 2(3) }\]

Answer 11

\[x=\frac{-1\pm \sqrt{4+192}}{2}=\frac{-1\pm \sqrt{196}}{2}\]

Answer 12

\[x=\frac{-1\pm14}{2}\]

Answer 13

\[x=\frac{-1+14}{2}=\frac{13}{2}\]

Answer 14

\[x=\frac{-1-14}{2}=\frac{-15}{2}\]

Answer 15

up one is 6.5

Answer 16

@Mertsj the other one is -7.5

Answer 17

yes, they are right. Didn't you see the answers I posted?

Answer 18

13 divided by 2 is 6.5
-15 divided by 2 is - 7.5

Answer 19

no i didnt sorry