Question

Find the square of :
1: 2x - 3y + z
2: 3a - 2b - 5c​

Answer 1

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Hope this helps you ❤❤

Answer 2

Answer:

(3a - 2b - 5c)^2 = (3a)^2 + ( - 2b)^2 + ( - 5c)^2 + (2 × 3a × - 2b + 2 × ( - 2b) × ( - 5c) + 2 × - 5c × 3a) = 9a^2 + 4b^2 + 25c^2 - 12ab + 20bc - 30ac