quick and simple maths problem - factorising (1 Viewer)

[marann]

hey guys.. i seem to have forgoton how to factorise? silly i know... can anyone help?
Factorise: -x^2 +9x -20

thank you

 

[hermand]

take the negative out of the equation


the -5 & -4 add to make -9 and multiply to make 20.

 

[x3.eddayyeeee]

(-x+5)(x-4)

= -x^2 + 4x + 5x - 20

= -x^2 + 9x - 20

EDIT. ^Poster above beat me to it.

 

[duckcowhybrid]

The answer is

(x - 4)(-x + 5)

Really how can't you do that.

 

[dux&src]

Everyone is right here

 

[Aerath]

The answer is

(x - 4)(-x + 5)

Really how can't you do that.

Not everyone is as mathematically talented as you are.

 

[tommykins]

Not everyone is as mathematically talented as you are.

haha please don't call him talented.