please help me in maths solution
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4x²-7y²
Step-by-step explanation:
=2x²-3y²,5x²+6y²,-3x²-4y²
=2x²-3y²+5x²+6y²+(-3x²)-4y²
=2x²-3y²+5x²+6y²-3x²-4y²
=2x²+5x²-3x²-3y²+6y²-4y²
=7x²-3x²-3y²-4y²
=4x²-7y²
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