Question

expand (5x-y+z)^2 by using suitable identity

Answer 1

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Identity - (a + b + c)²

▪︎ a² + b² + c² + 2ab + 2bc + 2ca

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♠️ (5x)² - y² + z² + 2(5x)(-y) + 2(-y)(z) + 2(z)(5x)

=> 25x² - y² + z² - 10xy - 2yz + 10zx

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Answer 2

Step-by-step explanation:

Answer

Identity - (a + b + c)²

▪︎ a² + b² + c² + 2ab + 2bc + 2ca

_______________________________________________

♠️ (5x)² - y² + z² + 2(5x)(-y) + 2(-y)(z) + 2(z)(5x)

=> 25x² - y² + z² - 10xy - 2yz + 10zx