Question

Factorise : 25x²+4y²+9z²-20xy-12yz+30xz

Answer 1

Step-by-step explanation:

the answet is

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

25x² + 4y² -20xy = (5x-2y)²

(5x-2y)² + 9z² - 12yz + 30zx

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

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Answer 2

Step-by-step explanation:

25x²+4y²+9z²-20xy-12yz+30xz

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

=(5x-2y+3z)²

Identity used=(a+b+c)²=a²+b²+c²+2ab+2bc+2ca