Question

I need help with one problem

5x^2+25x = 5x(x+5)

Answer 1

if you multiply on the right you also get \(5x^2+25x\) so you are looking at an identity, true for all \(x\)

Answer 2

Can you explain?

Answer 3

Distributive Property:\[\Large a(b+c) \quad=\quad ab+ac\]

In your problem \(\Large a\) would be \(\Large 5x\).

Answer 4

but couldn't x also be -5?