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-(7-2x)(7-2x)=49+7x
We move all terms to the left:
-(7-2x)(7-2x)-(49+7x)=0
We add all the numbers together, and all the variables
-(-2x+7)(-2x+7)-(7x+49)=0
We get rid of parentheses
-(-2x+7)(-2x+7)-7x-49=0
We multiply parentheses ..
-(+4x^2-14x-14x+49)-7x-49=0
We get rid of parentheses
-4x^2+14x+14x-7x-49-49=0
We add all the numbers together, and all the variables
-4x^2+21x-98=0
a = -4; b = 21; c = -98;
Δ = b2-4ac
Δ = 212-4·(-4)·(-98)
Δ = -1127
Delta is less than zero, so there is no solution for the equation
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