136=3.14*(x*x)*8.7

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Solution for 136=3.14*(x*x)*8.7 equation:



136=3.14(x*x)*8.7
We move all terms to the left:
136-(3.14(x*x)*8.7)=0
We add all the numbers together, and all the variables
-(3.14(+x*x)*8.7)+136=0
We calculate terms in parentheses: -(3.14(+x*x)*8.7), so:
3.14(+x*x)*8.7
We multiply parentheses
27.318x^2
Back to the equation:
-(27.318x^2)
We get rid of parentheses
-27.318x^2+136=0
a = -27.318; b = 0; c = +136;
Δ = b2-4ac
Δ = 02-4·(-27.318)·136
Δ = 14860.992
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{-(0)-\sqrt{14860.992}}{2*-27.318}=\frac{0-\sqrt{14860.992}}{-54.636} =-\frac{\sqrt{}}{-54.636} $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+\sqrt{14860.992}}{2*-27.318}=\frac{0+\sqrt{14860.992}}{-54.636} =\frac{\sqrt{}}{-54.636} $

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