Question

write in expanded form (- 2 X + 5 Y - 3 Z )square

Answer 1

Heya , here

Solution Given here ⬇

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Question is ( -2x + 5y - 3z )^2
Solution =

using id.
(x+y+z)^2=x^2 + y^2 + z^2 + 2xy + 2yz + 2zx

=> ( -2x)^2 + (5y)^2 + 3z^2 + (2×2x×5y) + (2×5y×-3z) + (2×-3z×-2x)

=> 4x^2 + 25y^2 + 9z^2 - 20xy -30y^2 + 12x^2
answer

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