Question

expand (5x+2y-3z)^2​

Answer 1

Answer:

We know that (a+b+c) ² = a²+b²+c²+2( ab + bc+ ca)

Given here a=5x b= 2y  c=-3z

substitute a,b,c in 1 st equation

(5x+2y-3z)² = 25x² + 4y² + 9z² + 20xy - 12yz - 30 xz

HOPE IT IS HELPFUL

Answer 2

Answer:

25x² + 4y² + 9z² + 12xy - 20yz - 30zx

Step-by-step explanation:

by identity (a+b+c)²=a²+b²+c²+2ab+2bc+2ca

(5x+2y-3z)²

= (5x+2y+(-3z))²

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

= 25x² + 4y² + 9z² + 12xy - 20yz - 30zx

HOPE IT HELPS YOU!!

MARK ME AS BRAINLIAST..