Question

(x-y+ z)² - (x-y-z)²​

Answer 1

Answer:

=> $-4xy-4y^2$

Step-by-step explanation:

using the identity $a^2-b^2=(a+b)(a-b)$

=> $(x-y+ z)^2 - (x-y-z)^2$

=> $(x-y+z+x-y-z)(x-y+z-x-y-z)$

=> $(2x-2y)(-2y)$

=> $(-2y)(2x)-(-2y)(-2y)$

=> $-4xy-4y^2$

                                                                                                               

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