Question

Find the following squares by using identities:
i) (xy+3z)2

ii) (0.4p-0.5q) 2​

Answer 1

Answer:

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Step-by-step explanation:

1)  ( xy)² +2×xy×3z + (3z)²

[(a + b)² = a² + 2ab + b² ]

x²y²+6xyz+9z²

2)

✔As we know the formula (a-b)² = a²-2ab+b²✔

➡(0.4p²)_2×0.4p×0.5q+(0.5q)

➡1.6p-0.40+2.5q²