Question

if a+b=4,ab=3 find 1/b square +1/a square

Answer 1

Answer:

Mark me as a Brainlist pls bcoz ur one Brainlist make me genius rank.

Step-by-step explanation:

$a + b \: = 4 \\ = > b = \frac{4}{a} \\ = > substitute \: the \: value \: of \: b \: \\ in \: the \: equation \: we \: get \\ = > a + \frac{4}{a} = 4 \\ = > \frac{ {a}^{2} + 4 }{a} = 4$

${a}^{2} - 4a + 4 = 0 \\ = > {a}^{2} - 2a - 2a + 4 = 0 \\ = > a(a - 2) - 2(a - 2) = 0 \\ = > (a - 2)(a - 2) = 0 \\ = > a = 2,2 \\ = > a = 2$

$now \: substitute \: the \: value \: of \: a \: in \\ the \: equation \: we \: get \\ = > a + b = 4 \\ = > 2 + b \: = 4 \\ = > b = 4 - 2 = 2 \\ = > b = 2$

∴ the value of a,b are 2,2 respectively

Mark me as a Brainlist pls bcoz ur one Brainlist make me genius rank.

Mark me as a Brainlist pls bcoz ur one Brainlist make me genius rank.

Mark me as a Brainlist pls bcoz ur one Brainlist make me genius rank.

Mark me as a Brainlist pls bcoz ur one Brainlist make me genius rank.