Q. 5 A5.0( 1 Vote )

Find the product of the following :

(a + b) (2a2 – 5ab + 3b2)

Answer :

a × (2a2 – 5ab + 3b2) + b × (2a2 – 5ab + 3b2)


( a × 2a2 - a × 5ab + a × 3b2) + (b × 2a2 – b × 5ab + b × 3b2)


( 2a2 + 1 – 5a1 + 1b + 3ab2) + (2a2b – 5ab2 + 3b2 + 1)


( an + m = an × am)


( 2a3 – 5a2b + 3ab2) + (2a2b – 5ab2 + 3b3)


2a3 – 5a2b + 2a2b + 3ab2– 5ab2 + 3b3


2a3 + (– 5 + 2)a2b + (3-5)ab2 + 3b3


2a3 - 3a2b - 2ab2 + 3b3


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