Question

factorise it
(x+y) ^2 - (x-y)^2​

Answer 1

Answer:

use a^2-b^2= (a+b)(a-b)

x^2-y^2= x^2-y^2

=(x+y)(x-y)

=x^2-y^2

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

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

${x}^{2} + {y}^{2} + 2xy - {x}^{2} + {y}^{2} - 2xy$

Sign changes....

${x}^{2} + {y}^{2} + 2xy - {x}^{2} - {y}^{2} + 2xy$

$2xy + 2xy$

$4xy$

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