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1-4x^2-7=25
We move all terms to the left:
1-4x^2-7-(25)=0
We add all the numbers together, and all the variables
-4x^2-31=0
a = -4; b = 0; c = -31;
Δ = b2-4ac
Δ = 02-4·(-4)·(-31)
Δ = -496
Delta is less than zero, so there is no solution for the equation
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