Question

What are the exact solutions of x2 = 4 − 7x?

Answer 1

is x2 really x^2

Answer 2

yes

Answer 3

x^2+7x=4

8x^2=4

x^2= 4/8

x^2= 1/2

x=\[\sqrt{1/2}\]

Answer 4

thats none of the answers lol

Answer 5

huh then i got wrong maybe dpalnc can help

Answer 6

get the quadratic in standard form first:
x^2 + 7x - 4 = 0
a=1
b=7
c=-4
use quadratic formula:
\[\large x=\frac{-b\pm\sqrt{b^2-4ac}}{2a} \]

Answer 7

i see that but its so confusing...

Answer 8

\[\large x =\frac{-b\pm \sqrt{b^2-4ac}}{2a}=\frac{-(7)\pm \sqrt{7^2-4(1)(-4)}}{2(1)} \]