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Question

If x=4a2+b26ab , y=3b22a2+8ab and z=6a2+8b26ab, find:
(i) 𝑥+𝑦+𝑧

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Solution

Steps: Adding x, y & z x+y+z=(4a2+b26ab)+(3b22a2+8ab)+(6a2+8b26ab)
=(4a22a2+6a2)+(b2+3b2+8b2)+(6ab+8ab6ab) =(2a2+6a2)+(4b2+8b2)+(2ab6ab) =8a2+12b24ab
Hence, the answer is (8a2+12b24ab).

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