Question

minus 2 X + 3 Y - 5 Z whole square​

Answer 1

Answer:

->(3y-2x-5z)^2

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

=9y^2+4x^2+25z^2-6xy+10xz-15yz

hope this helps

Answer 2

Answer:

1. (a+b+c)^2= a^2+b^2+c^2+2ab+2bc+2ca
2. [2X+3Y+(-5Z)]^2=(2X)^2 + (3Y)^2 + (-5Z)^2 +2×2X×3Y + 2×3Y×(-5Z) + 2×(-5Z)×2X

= 4X^2 + 9Y^2 + 25Z^2 + 12XY - 30YZ - 20ZX

Hope this help you