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8(2+3x)(1-8x)=47
We move all terms to the left:
8(2+3x)(1-8x)-(47)=0
We add all the numbers together, and all the variables
8(3x+2)(-8x+1)-47=0
We multiply parentheses ..
8(-24x^2+3x-16x+2)-47=0
We multiply parentheses
-192x^2+24x-128x+16-47=0
We add all the numbers together, and all the variables
-192x^2-104x-31=0
a = -192; b = -104; c = -31;
Δ = b2-4ac
Δ = -1042-4·(-192)·(-31)
Δ = -12992
Delta is less than zero, so there is no solution for the equation
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