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8(7-3x)+1=4(2-x)(2+x)
We move all terms to the left:
8(7-3x)+1-(4(2-x)(2+x))=0
We add all the numbers together, and all the variables
8(-3x+7)-(4(-1x+2)(x+2))+1=0
We multiply parentheses
-24x-(4(-1x+2)(x+2))+56+1=0
We multiply parentheses ..
-(4(-1x^2-2x+2x+4))-24x+56+1=0
We calculate terms in parentheses: -(4(-1x^2-2x+2x+4)), so:We add all the numbers together, and all the variables
4(-1x^2-2x+2x+4)
We multiply parentheses
-4x^2-8x+8x+16
We add all the numbers together, and all the variables
-4x^2+16
Back to the equation:
-(-4x^2+16)
-(-4x^2+16)-24x+57=0
We get rid of parentheses
4x^2-24x-16+57=0
We add all the numbers together, and all the variables
4x^2-24x+41=0
a = 4; b = -24; c = +41;
Δ = b2-4ac
Δ = -242-4·4·41
Δ = -80
Delta is less than zero, so there is no solution for the equation
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