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Find the following products: (i)z^2+2)...

Find the following products:
(i)`z^2+2)(z^2-3)`
(ii) `(3x-4y)(2x-4y)`
`(3x^2-4x y)(3x^2-3x y)`
(iv) `(x+1/5)(x+5)`

Text Solution

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Given :
` (i) (z^2+2)(z^2-3)`
`=> (z^2(z^2-3)+2(z^2-3)`
`=> (z^4-3z^2+2z^2-6)`
`=> (z^4-z^2-6)`
(ii) `(3x-4y)(2x-4y)`
`=> 3x(2x-4y)-4y(2x-4y)`
`=> 6x^2-12xy-8xy+16y^2`
...
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