Question

expand:-(X/3+y/5-z/8)^2​

Answer 1

Answer:

x²/9+y²/25+z²/64+2xy/15-2yz/40-2xz/24

Step-by-step explanation:

we know, (a + b + c)² = a² + b² + c² + 2ab + 2bc + 2ac

[here, a= x/3, b= y/5, c= -z/8]

(x/3+y/5-z/8)²=(x/3)²+(y/5)²+(-z/8)²+2(x/3)(y/5)+2(y/5)(-z/8)+2(x/3)(-z/8)

=x²/9+y²/25+z²/64+2xy/15-2yz/40-2xz/24