Answer:
(i) 2a²+3ab+ac+2ab-3b²+bc-2ac+3bc
=2a²-3b²-ab-ac+4bc
(ii) x(2x+y)+y(2x+y)+x(x−y)+2y(x−y)
2x²+xy+2xy+y²+x²-xy+2xy-2y²
(2+1)x²+(1+2-1+2)xy+(1-2)y²
3x²+4xy-y²
(iii) a²+ab-ac+ab+b²-bc+ac+bc-c²
a²+2ab+b²-c²
(a+b)²-c²
Step-by-step explanation:
hope it will help you plz mark it as brainlist
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Verified answer
Answer:
(i) 2a²+3ab+ac+2ab-3b²+bc-2ac+3bc
=2a²-3b²-ab-ac+4bc
(ii) x(2x+y)+y(2x+y)+x(x−y)+2y(x−y)
2x²+xy+2xy+y²+x²-xy+2xy-2y²
(2+1)x²+(1+2-1+2)xy+(1-2)y²
3x²+4xy-y²
(iii) a²+ab-ac+ab+b²-bc+ac+bc-c²
a²+2ab+b²-c²
(a+b)²-c²
Step-by-step explanation:
hope it will help you plz mark it as brainlist