F(-4)=4x^2-5x+8

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Solution for F(-4)=4x^2-5x+8 equation: 



(-4)=4F^2-5F+8

We move all terms to the left:

(-4)-(4F^2-5F+8)=0

We add all the numbers together, and all the variables

-(4F^2-5F+8)-4=0

We get rid of parentheses

-4F^2+5F-8-4=0

We add all the numbers together, and all the variables

-4F^2+5F-12=0

a = -4; b = 5; c = -12;
Δ = b2-4ac
Δ = 52-4·(-4)·(-12)
Δ = -167
Delta is less than zero, so there is no solution for the equation

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