Emmeline is working on simplifying the following expression below with steps shown: (5x)2 + (5x2 - 5)^2 Step 1: 25x^2 + (5x^2 - 5)^2
Step 2: 25x^2 + 25x^2 + 25
Step 3: 50x^2 + 25
Step 4: 75x^2

Which statement is true regarding Emmeline’s work?
Emmeline’s work is entirely correct.
There is a mistake in step 2, only.
There are mistakes in step 2 and step 4.
There is a mistake in step 4, only.