Question

(2z-3+x-y)(2z-3-x+y)​

Answer 1

Answer: (2z-3+x-y)(2z-3-x+y)

= {(2z-3)+(x-y)} {(2z-3)-(x-y)} [using formula a+b * a-b]

= (2z-3)² - (x-y)²

= {4z²+9-12z} - {x²+y²-2xy}

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