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15(2)+x(2)=46
We move all terms to the left:
15(2)+x(2)-(46)=0
We add all the numbers together, and all the variables
x^2+106=0
a = 1; b = 0; c = +106;
Δ = b2-4ac
Δ = 02-4·1·106
Δ = -424
Delta is less than zero, so there is no solution for the equation
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