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2x^2=7x-15
We move all terms to the left:
2x^2-(7x-15)=0
We get rid of parentheses
2x^2-7x+15=0
a = 2; b = -7; c = +15;
Δ = b2-4ac
Δ = -72-4·2·15
Δ = -71
Delta is less than zero, so there is no solution for the equation
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