what is square of (2y²+5z²)
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Given : (2y²+5z²)
To Find : Square
Solution:
Let say
X = (2y²+5z²)
Squaring both sides
=> X² = (2y²+5z²)²
Using the identity (a + b)² = a² + b² + 2ab
a = 2y² , b=5z²
=> X² =(2y²)² + (5z²)² + 2(2y²)(5z²)
=> X² = 4y⁴ + 25z⁴ + 20y²z²
Hence (2y²+5z²)² = 4y⁴ + 25z⁴ + 20y²z²
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