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15x*14x+103=189103
We move all terms to the left:
15x*14x+103-(189103)=0
We add all the numbers together, and all the variables
15x*14x-189000=0
Wy multiply elements
210x^2-189000=0
a = 210; b = 0; c = -189000;
Δ = b2-4ac
Δ = 02-4·210·(-189000)
Δ = 158760000
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{158760000}=12600$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-12600}{2*210}=\frac{-12600}{420} =-30 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+12600}{2*210}=\frac{12600}{420} =30 $
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