1.

Expand (2x + 5y-3z)²​

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 -12zxPLEASE MARK MY ANSWER AS BRAINLIEST PLEASE MARK MY ANSWER AS BRAINLIEST Step-by-step EXPLANATION:



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