16(x+y)^2+24(x+y)(y-z)+9(y-z)^2
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4x²+9y²+16z²+12xy-24yz-16xz
= (2x)²+(3y)²+(-4z)²+2[(2x)(3y)+(3y)(-4z)+(-4z)(2x)]
=(2x+3y-4z)²
= (2x)²+(3y)²+(-4z)²+2[(2x)(3y)+(3y)(-4z)+(-4z)(2x)]
=(2x+3y-4z)²
pushpa1234:
think it would help you
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