using proper identities find the products:-
(1) (2x-y+3) (2x-y-3)
(2) (3x+y-5) (3x-y-5)
(3) (2x+3y+4z) (4x²+9y²+16z²-16xy-12yz-8zx)
(4) (2x-y+3z) (4x²+y²+9z²+2y+3yz-6zx)
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Answered by
4
let 2x-y=a
and 3be b
(a+b)(a-b)=a^2-b^2
(2x-y)^2-9
4x^2+y^2-4xy-9
2.same as first
3.(a+b+c)(a^2+b^2+c^2-ab-bc-ca)=a^3+b^3+c^3-3abc
(2x)^3+(3y)^3+(4z)^3-72xyz
8x^3+27y^3+64z^3-72xyz
4. same as third
and 3be b
(a+b)(a-b)=a^2-b^2
(2x-y)^2-9
4x^2+y^2-4xy-9
2.same as first
3.(a+b+c)(a^2+b^2+c^2-ab-bc-ca)=a^3+b^3+c^3-3abc
(2x)^3+(3y)^3+(4z)^3-72xyz
8x^3+27y^3+64z^3-72xyz
4. same as third
Answered by
1
can answer only 1st and 3rd questions mujhe 4th quetion me galti lagti hai
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