Question

$(x2 + y2 - z2)2 - (x2 - y2 + z2)2$
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Answer 1

Step-by-step explanation:

this will be your answer

4y^2 + 2z^2

Answer 2

Answer:

4x²( y²-z²) ( ans)

Step-by-step explanation:

formula used :

(a + b + c)² = a² + b² + c² + 2ab + 2bc + 2ca.

(x² + y² - z²)² - (x² - y² + z²)²

= (x²)² + (y²)²+(-z²)² + 2(x²)(y²) +2(y²)(-z²) + 2(-z²)(x²) - { (x²)²+(-y²)²+(z²)²+2(x²)(-y²)+2(-y²)(z²)+2(z²)(x²) }

= x⁴+ y⁴+ z⁴ + 2x²y²- 2y²z²-2x²z²-x⁴-y⁴-z⁴ +2x²y²+2y²z²-2x²z²

= 4x²y²-4x²z² = 4x²( y²-z²) ( ans)

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