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4x^2+3x-12=0
a = 4; b = 3; c = -12;
Δ = b2-4ac
Δ = 32-4·4·(-12)
Δ = 201
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(3)-\sqrt{201}}{2*4}=\frac{-3-\sqrt{201}}{8} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(3)+\sqrt{201}}{2*4}=\frac{-3+\sqrt{201}}{8} $
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