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3x*4x=768
We move all terms to the left:
3x*4x-(768)=0
Wy multiply elements
12x^2-768=0
a = 12; b = 0; c = -768;
Δ = b2-4ac
Δ = 02-4·12·(-768)
Δ = 36864
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{36864}=192$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-192}{2*12}=\frac{-192}{24} =-8 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+192}{2*12}=\frac{192}{24} =8 $
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