25z^2 - 4x^2 + 44xy - 121y^2 factories the following
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25z^2 - 4x^2 + 44xy - 121y^2 factories the following
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Answer:
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Step-by-step explanation:
We have
4x2+9y2+25z2−12xy−30yz+20zx
=[(2x)2+(−3y)2+(5z)2+2(2x)(−3y)+2(−3y)(5z)+2(5z)(2x)]
Comparing with the identity V,
(x+y+z)2≡x2+y2+z2+2xy+2yz+2zx, we get
=(2x−3y+5z)2
=(2x−3y+5z)(2x−3y+5z).