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4(x+y)^2 - 12(x-y)(x+y)+9(x+y)^2 |
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Answer» x²+25y²+26xyStep-by-step EXPLANATION:=>4(x+y)² - 12(x+y)(x-y) + 9(x+y)²=>4(x+y)²+9(x+y)² -12(x²-y²)=>[(x+y)²(4+9)] - 12 (x²-y²)=>[13(x+y)²] - 12 (x²-y²)=>[13(x²+y²+2xy)] - (12x²-12y²)=>13x²+13y²+26xy-12x²+12y²=>x²+25y²+26xyHOPE IT HELPS |
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