Question

simplify using identities:
plz answer
test going on ​

Answer 1

Answer:

0 is the ans

Step-by-step explanation:

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Answer 2

Answer:

(x - y)(x + y) + (y + z)(y - z) + (z - x)(z + x) = 0

Step-by-step explanation:

We have,

(x - y)(x + y) + (y + z)(y - z) + (z - x)(z + x)

Now,

we know that,

(a + b)(a - b) = a² - b²

Hence,

(x - y)(x + y) + (y + z)(y - z) + (z - x)(z + x)

= (x² - y²) + (y² - z²) + (z² - x²)

= x² - y² + y² - z² + z² - x²

= x² - x² + y² - y² + z² - z²

= 0

Hence,

(x - y)(x + y) + (y + z)(y - z) + (z - x)(z + x) = 0

Hope it helped and believing you understood it........All the best