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Using identity (3x^2-4y^2) (3x^2-4y^2) |
Answer» ANSWER:
GIVEN:
TO FIND:
SOLUTION:= (3x²-4y²)(3x²-4y²) = (3x²-4y²)² = (3x²)²+(4y²)²-2×3x²×4y² = 9x⁴+16y⁴-24x²y² IDENTITY USED:
NOTE:Some IMPORTANT formulas: (a+b)² = a²+b²+2ab (a-b)² = a²+b²-2ab (a+b)(a-b) = a²-b² (a+b)³ = a³+b³+3ab(a+b) (a-b)³ = a³-b³-3ab(a-b) a³+b³ = (a+b)(a²+b²-ab) a³-b³ = (a-b)(a²+b²+ab) (a+b)² = (a-b)²+4ab (a-b)² = (a+b)²-4ab |
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