Question

Expand (2x + 5y-3z)²​

Answer 1

Answer:

(a+b+c)² = a² + b² + c² + 2(ab+bc+ca)

(2x + 5y-3z)²​ = (2x)² + (5y)² + (-3z)² + 2[(2x)(5y) + (5y)(-3z) + (-3z)(2x)]

(2x + 5y-3z)² = 4x² + 25y² + 9z² +2[ 10xy - 15yz - 6zx ]

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

PLEASE MARK MY ANSWER AS BRAINLIEST

PLEASE MARK MY ANSWER AS BRAINLIEST

Step-by-step explanation:

Answer 2

using the identity:- (a+b+c)²= a²+b²+c²+2ab+2bc+2ca

we will find our answer

refer to the attachment

if it helps then please mark me as brainliest