Question

(-2+5y -3z)²= please answer it ​

Answer 1

Answer:

25y^2 - 30yz + 9z^2 -20y + 12z + 4

Answer 2

Answer:

$( - 2x + 5y - 3z) {}^{2}$

= [5y-(2x + 3z)]²

$= 25y {}^{2} - 2.5y(2x + 3z) + (2x + 3z) {}^{2}$

$25y { }^{2} - 20xy - 30yz + 4x { }^{2} + 2.2 \times 3z + 9z {}^{2}$

$4x {}^{2} + 25y {}^{2} + 9z {}^{2} - 20xy + 12xz - 30yz$