Help please How to weigh 9 kg of rice only three times and divide it into 7 kg and 2 kg using one weight of 50 g and 200 g?
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1/2*qr*rs

step-by-step explanation:

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

i would love   to but there is no graph shown

step-by-step explanation:

i am so sorry

804.75

step-by-step explanation: