substraction in algebra

ccambre shared this problem 2 weeks ago
In Progress

with inputs for f and g the equation f-g is wrongly calculated because strangely the +4 isn't changed into -4 in a basic substraction.

online: https://www.geogebra.org/m/yjzre4ay

/Kw8CaRGQBubNOH7P0u1jUn2XqoiAAAAAElFTkSuQmCC

Comments (2)

photo
1

typing f(x)-g(x)=0 is OK

photo
1

muchas gracias. Writing brackets indeed prevents the error.

Graphically f - g shows the line x = 1 while in the Algebra it gives x = -3/5.

The same solution in the Algebra as in the Graphics could be expected in any case.

Comments have been locked on this page!

© 2021 International GeoGebra Institute