Question

3x +4y का वर्ग क्या है​

Answer 1

(3x + 4y)² = 9x² + 24xy + 16y²

Given:

The expression (3x + 4y)

To find:

Square of (3x + 4y)

Concept:

Before we solve the problem, we must know some algebraic identities:

• (a + b)² = a² + 2ab + b²

• (a - b)² = a² - 2ab + b²

What does squaring a number or an expression mean?

It simply means that we are finding its product with itself.

For example, (a + b)²

= (a + b) × (a + b)

= a × (a + b) + b × (a + b)

= a² + ab + ba + b²

= a² + ab + ab + b², since multiplication is commutative

= a² + 2ab + b²

Step-by-step explanation:

Now, (3x + 4y)²

= (3x)² + 2 × 3x × 4y + (4y)²

= 9x² + 24xy + 16y²

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