Question

1 и 2 номера с объяснениями ,пожалуйста!!!!!!!!

Answer 1

$1)quad x=14frac{11}{12}; ,; ; y=8frac{11}{12}\\x^2-2xy+y^2=(x-y)^2=(14frac{11}{12}-8frac{11}{12})^2=6^2=36\\2)quad a^2-b^2=(a-b)(a+b)\\(6,375)^2-(7,375)^2=(6,375-7,375)(6,375+7,375)=\\=-1cdot 13,75=-13,75$