Question

3x + 23x² + 6y² + 2x + y² + ______ = 5x + 7y².

Answer 1

3x + 23x² + 6y² + 2x + y² + –23x² = 5x + 7y².

Explanation:

Let (3x + 23x² + 6y² + 2x + y²) + M = 5x + 7y²

⇒ M = (5x + 7y²) – (3x + 23x² + 6y² + 2x + y²)

⇒ M = 5x + 7y² – 3x – 23x² – 6y² – 2x – y² ......[With –ve sign, +ve sign in the bracket will change on opening it]

⇒ M = 5x – 3x – 2x + 7y² – 6y² – y² – 23x²

M = 0 + 0 – 23x² = –23x²