9 y^{2}+25 z^{2}-12 x y-30 y z+20 z x – InterviewSolution

InterviewSolution

1.	9 y^{2}+25 z^{2}-12 x y-30 y z+20 z x
Answer» 4xx + 9yy + 25z*z - 12xy - 30yz + 20zx = (2x)(2x) + (-3y)(-3y) + (5z)(5z) + 2(2x)(-3y) + 2(-3y)(5z) + 2(5z)(2x) = (2x-3y+5z)(2x-3y+5z)

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