Question

Expand  (-2x  + 5y²- z³)²
pls explain this


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Answer 1

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Answer 2

Answer:

use (a+b+c)^2= a^2+b^2+c+^2+2(ab+bc+ca)

you get

4x^2+25y^4+z^6+2(-10xy^2-5y^2z^3+2xz^3)