## minthia one year ago simplify the expression 5^2 -4 over 5 + 2

1. rishavraj

5^2 - 4 = 5^2 - 2^2

2. minthia

that's not one of my answers

3. rishavraj

a^2 - b^2 = (a + b)(a - b)

4. anonymous

$\frac{ 5^2-4 }{ 5+2 }=\frac{ 25-4 }{ 7 }=\frac{ 21 }{ 7 }$

5. anonymous

$21 \div 7=?$

6. minthia

3

7. anonymous

Then 3 is the simplified form of the expression.

8. minthia

thank you