Answer:
a² + b²
Step-by-step explanation:
(a + b)² - 2ab ← expand parenthesis using FOIL
= a² + 2ab + b² - 2ab ← collect like terms
= a² + b²
yes
4/6 of 100 = 66.6666666667
i dont know
25
X² = 7² + 24²
X² = 49 + 576
X² = 625
X = 25
