x^2+4.5x=0

x(x+4.5)=0

x=0 or x+4.5=0

x=0 or x=-4.5

2.

x^2-9x=0

x(x-9)=0

x=0 or x-9=0

x=0 or x=9

3.

-x^2+10x=0

x(-x+10)=0

x=0 or -x+10=0

x=0 or x=10

number 3.can also be done like this:

-x^2+10x=0

-x(x-10)=0

x=0 or x-10=0

x=0 or x=10

if you need more explanations,contact me…

x^2+4.5x=0

x^2+4.5x

(x+4.5)(x+0) final answer

check just multiply (x+4.5)(x+0)

=x^2+0+4.5x+0

=x^2+4.5x

no. 2

x^2-9x=0

x^2-9x

(x-9)(x+0) final answer

check just multiply (x-9)(x+0)

=x^2+0-9x-0

=x^2-9x

n0. 3

same as no. 2

x^2+10x=0

x^2=10x

(x+10)(x-0) final answer

check just multiply (x+10)(x+0)

=x^2+0+10x+0

=x^2+10x

or pwede din ganto….

itratranspose mo ung 0……

1. x^2+4.5x=0

x^2+4.5x-0

x(x+4.5-0)

2. x^2-9x=0

x^2-9x-0

x(x-9x-0)

3. x^2+10x=0

x^2+10x-0

x(x+10-0)

yan po ang pagka2lam ko…. w8 mo n lng ung iba……