Question

(-2x+5y-3z)2 factorise

Answer 1

Heya ✋

$( - 2x + 5y - 3z) ^{2} \\ = ( - 2x) ^{2} + (5y) ^{2} + ( - 3z) ^{2} + \\ 2 \times ( - 2x) \times 5y + 2 \times 5y \times \\ ( - 3z) + 2 \times ( - 3z) \times ( - 2x) \\ = 4x ^{2} + 25y ^{2} + 9z ^{2} - 20xy \\ - 30yz + 12zx$



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