If a=x+y and b=x-y ,show that (a-b)^2=4y^2

Jeroen De Leeuw asked Oct 16, 2023

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Jeroen De Leeuw asked Oct 16, 2023

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Explanation:

$((x + y) - (x - y) ){}^(2) = 4 {y}^(2)$

$(2y) {}^(2) = 4 {y}^(2)$

${2}^(2) {y}^(2) = {4y}^(2)$

$4 {y}^(2) = 4 {y}^(2)$

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