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-9n^2=7-5n
We move all terms to the left:
-9n^2-(7-5n)=0
We add all the numbers together, and all the variables
-9n^2-(-5n+7)=0
We get rid of parentheses
-9n^2+5n-7=0
a = -9; b = 5; c = -7;
Δ = b2-4ac
Δ = 52-4·(-9)·(-7)
Δ = -227
Delta is less than zero, so there is no solution for the equation
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