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9-7x(5x-8)=63-9x
We move all terms to the left:
9-7x(5x-8)-(63-9x)=0
We add all the numbers together, and all the variables
-7x(5x-8)-(-9x+63)+9=0
We multiply parentheses
-35x^2+56x-(-9x+63)+9=0
We get rid of parentheses
-35x^2+56x+9x-63+9=0
We add all the numbers together, and all the variables
-35x^2+65x-54=0
a = -35; b = 65; c = -54;
Δ = b2-4ac
Δ = 652-4·(-35)·(-54)
Δ = -3335
Delta is less than zero, so there is no solution for the equation
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