Question

factorize 9x2 + y2 +z2-6xy+2yz-6xz & find it's value when x=1, y=2, z=-1

Answer 1

Answer:

42 is the answer of question

Step-by-step explanation:

9×2+(2)2+(-1)2-6(1)(2)+2(2)(-1)-6(1)(-1)

18+4+(-2)-6(2)+2(-2)-6(0)

22+(-2)(-12)-4-0

22+24-4

46-4

42

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