निम्न के मान ज्ञात कीजिए ।
(i) `(3x-4y+5z)(9x^(2)+16y^(2)+25z^(2)+12xy-15zx+20yz)`
(ii) `(3x+2y+2z)(9x^(2)+4y^(2)+4z^(2)-6xt-4yz-6zx)`
(iii) `(2x-y+3z)(4x^(2)+y^(2)+9z^(2)+2xy+3yz-6xz)`

Explanation

(i) `27x^(3)-64y^(3)+125z^(3)+180xyz`
(ii) `27x^(3) + 8y^(3) + 8z^(3) - 36xyz`
(iii) `8x^(3) - y^(3) + 27z^(3) + 18xyz`