1.

Plz solve them both .urgent bcoz tommorow is my math exam

Answer» 15. 3-5x+5y-12(x-y)²
= 3-5x+5y-12(x²+y²+2xy)
= 3-5x+5y-12x²-12y²-24xy

16. 9x²+3x-8y-64y²
= 9x²+3x-8y-64y²

14 NUMBER is not CLEAR...


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