Which is the correct factor analysis of x² - 2xy - z² + 2yz?
সমাধান
সঠিক উত্তর: Option A
x² - 2xy - z² + 2yz?
= x² -zx-2xy+2yz+zx-z²
=x(x-z)-2y(x-z)+z(x-z)
=(x-z)(x-2y+z)
= x² -zx-2xy+2yz+zx-z²
=x(x-z)-2y(x-z)+z(x-z)
=(x-z)(x-2y+z)
