Fatorise (x-y)^2-7(x^2-y^2)+12(x+y)^2 pls solve this question assignment to be complted
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Answer:
2(3x²+ 4y²+11xy)
Step-by-step explanation:
(x-y)²-7(x²-y²)+12(x+y)²
= x²+y²-2xy-7x²+7y²+12(x²+y²+2xy)
= -6x²+8y²-2xy+12x²+12y²+24xy
= 6x² + 8y² + 22xy
= 2(3x²+ 4y²+11xy)
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