9a2-15a=0

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Solution for 9a2-15a=0 equation:



9a^2-15a=0
a = 9; b = -15; c = 0;
Δ = b2-4ac
Δ = -152-4·9·0
Δ = 225
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$a_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$a_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{225}=15$
$a_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-15)-15}{2*9}=\frac{0}{18} =0 $
$a_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-15)+15}{2*9}=\frac{30}{18} =1+2/3 $

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