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3x-7=7x^2+2
We move all terms to the left:
3x-7-(7x^2+2)=0
We get rid of parentheses
-7x^2+3x-2-7=0
We add all the numbers together, and all the variables
-7x^2+3x-9=0
a = -7; b = 3; c = -9;
Δ = b2-4ac
Δ = 32-4·(-7)·(-9)
Δ = -243
Delta is less than zero, so there is no solution for the equation
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