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7x^2+3-101=0
We add all the numbers together, and all the variables
7x^2-98=0
a = 7; b = 0; c = -98;
Δ = b2-4ac
Δ = 02-4·7·(-98)
Δ = 2744
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{2744}=\sqrt{196*14}=\sqrt{196}*\sqrt{14}=14\sqrt{14}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-14\sqrt{14}}{2*7}=\frac{0-14\sqrt{14}}{14} =-\frac{14\sqrt{14}}{14} =-\sqrt{14} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+14\sqrt{14}}{2*7}=\frac{0+14\sqrt{14}}{14} =\frac{14\sqrt{14}}{14} =\sqrt{14} $
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