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find the product of
1. (3x + 2y - z) ^2 =
2.(x + 7y + z) ^2

Need answer po please ​


Sagot :

Answer:

1. 9x^2+4y^2+z^2+12xy-6xz-4yz

2.x^2+49y^2+z^2+14xy+2xz+14yz

Step-by-step explanation: