- Home
- Standard 9
- Mathematics
2. Polynomials
hard
निम्नलिखित के गुणनखंड कीजिए
$25 x^{2}+16 y^{2}+4 z^{2}-40 x y+16 y z-20 x z$
Option A
Option B
Option C
Option D
Solution
$25 x^{2}+16 y^{2}+4 z^{2}-40 x y+16 y z-20 x z$
$=(-5 x)^{2}+(4 y)^{2}+(2 z)^{2}+2 \cdot(-5 x)(4 y)+2(4 y)(2 z)+2(2 z)(-5 x)$
$=(-5 x+4 y+2 z)^{2}$
Standard 9
Mathematics