Question

Write down the squares of the following: (3x + 5y), (2y- z)?​

Answer 1

Step-by-step explanation:

(3x+5y)square

= (3x×3x)+(5y×5y)

= (9x)square+(25y)square

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Answer 2

Answer:

Step-by-step explanation:

(3x+5y)²=(3x)²+2(3x)(5y)+(5y)²=9x²+30xy+25y²

used by identity (a+b)²=a²+2ab+b²

(2y-z)²=(2y)²-2(2y)(z)+(z)²=4y²-4yz+z²

used by identity (a-b)²=a²-2ab+b²

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