. Calculează: a) |– 4| + |5| + |–11|; b) |–27| – |– 13| + |16|; c) |–14|  |–2| – |–8|; d) |28| : |–14| + |8|; e)       86 2 | 2| : |2| | 2|   ; f)   2 | 5 2 | :| 3| | 3|    .

they disappear if your absent from to long. i found out that the hard way.

step-by-step explanation:

brainliest lol i just need one more brainliest.

let's call the solutions x₁ = (5 - 2√7)/3 and x₂ = (5 + 2√7)/3

then the equation is (x-x₁)(x-x₂) = 0

if you fill that in you get a lot of numbers which you can recognize as ax²+bx+c=0.

step-by-step explanation:

you can see that a=1 (there is just an x²)

b = (-5 -2√7 + 2√7 - 5)/3 = -10/3

c = -2√7)/3 ) * (-5+2√7)/3) = -1/3

so your answer is 3x^2 – 10x – 1 = 0