Question

$question \: expansion \: of \: ( \frac{3a - {}{2} }{2 \: \: \: 3b}) ^{2} will \: be$
$ques.if \: {x}^{2} + \frac{1}{ {x}^{2} } = 7 \: then \: the \\ the \: vaue \: of \: x + \frac{1}{x} will \: be$

$ques.if \: {a}^{2} + {b}^{2} + {c}^{2} = 125 \\ and \: ab + bc + ca = 50 \\ then \: the \: value \: of \: a + b + c \: will \: be$
$ques.the \: expansion \: of \: (2x + 3y + 5) \\ (2x + 3y - 5)will \: be$
ASAP ☺️
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Answer 1

Step-by-step explanation:

➡ I don't know how to do first question because I can't understand that question..

➡but I answered 2,3,4 questions..