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4x*4x-20x+16=0
We add all the numbers together, and all the variables
-20x+4x*4x+16=0
Wy multiply elements
16x^2-20x+16=0
a = 16; b = -20; c = +16;
Δ = b2-4ac
Δ = -202-4·16·16
Δ = -624
Delta is less than zero, so there is no solution for the equation
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