Question

x^2-4x-7=0

Answer 1

i know the answer is \[4\pm \sqrt{44}/2\] but i dont now how to simplify that and get it to this \[2\]

Answer 2

2\[2\pm \sqrt{11}\]

Answer 3

@ash2326 could u help me

Answer 4

\[4 \pm \sqrt{16+28}\over2\]\[4 \pm {44}\over2\]\[4 \pm 2\sqrt{11}\over2\]\[\alpha={4+2\sqrt{11}\over2}\]\[\beta={4-2\sqrt{11}\over2}\]

Answer 5

but where does the 2 on the bottom go

Answer 6

now\[\alpha={2(2+\sqrt{11})\over2}=2+\sqrt{11}\]\[\beta={2(2+\sqrt{11})\over2}=2+\sqrt{11}\]

Answer 7

isn't it is at the bottom of alpha & beta.

Answer 8

no