Question

factories 25x² +4y²+9x²-20xy-12yx+30xx​

Answer 1

Answer

(5x)

2

+(2y)

2

+(3z)

2

−2(5x)(2y)+2(2y)(3z)−2(3z)(5x)

=(5x−2y−3z)

2

Only x is negative.

=(−(−5x+2y+3z))

2

Or =(5x−2y−3z)

Answer 2

$\huge \dag \: { \boxed{ \underline{ \sf{ \pink{Answer}}}}}$

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

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