Question

Find the value of x²+y² if:
I) x+y=20 and xy=12

II) x-y=12 and xy=13

can anyone help me with a solution to these two questions? ​

(I cannot dm since I just started and brainly won't allow me) ​

Answer 1

Answer:

apply identity for solving this question.

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Answer 2

$\huge \boxed{ \red {\blue{ \green{ \orange{ \pink{ \purple{A}n}s}w}e}r : - }}$

${x}^{2} - {y}^{2} = (x + y)(x - y)$

$= {x}^{2} - {y}^{2} = 20 \times 13 \\ = 260$

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