Question

factotise the following expression
a^2 + 2ab +b^2 - 25​

Answer 1

Answer:

a^2 + 2ab + b^2=25

(a+b) ^2=25

a+b=5

Answer 2

Answer:

${a}^{2} + 2ab + {b}^{2} - 25 = 0 \\ = > {a}^{2} + 2ab + {b}^{2} = 25 \\ = > ({a + b})^{2} = {5}^{2} \\ = > a + b = 5 \\ = > a + b - 5 = 0$