Answer:
Step-by-step explanation:
1 - 25 (a+b)^2 = 1 - 5² (a+b)²
= 1 - (5*[a + b) ]² { [tex]a^{m} *a^{n} = a^{m+n}[/tex] }
= 1 - (5a +5b)²
= (1 + 5a +5b) (1 - [5a + 5b]) { a² - b² = (a + b)(a - b) }
=(1 + 5a +5b) (1- 5a - 5b)
