X=(6i)(-3i)

Solution for X=(6i)(-3i) equation:

X=(6X)(-3X)

We move all terms to the left:

X-((6X)(-3X))=0


We calculate terms in parentheses: -(6X(-3X)), so:

6X(-3X)

We multiply parentheses

-18X^2

Back to the equation:

-(-18X^2)


We get rid of parentheses

18X^2+X=0

a = 18; b = 1; c = 0;
Δ = b2-4ac
Δ = 12-4·18·0
Δ = 1
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{1}=1$
$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(1)-1}{2*18}=\frac{-2}{36}
=-1/18
$
$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(1)+1}{2*18}=\frac{0}{36}
=0
$