Please tell question 11 (8th class)?
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Please tell question 11 (8th class)?
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Answer:
option (d) = (5x + 3y)³
Step-by-step explanation:
since it is objective you will be not having that much time to calculate.
so, here I am explaining you the simplest way.
125x³ means (5x)³
so it is not option a or b. since it was 3x given in option a & b.
throughout the equation all are plus➕ there is no minus ➖
hence it is (5x+3y)³
FORMULA:
(a+b)³ = a³ +b³ + 3a²b + 3ab²
(a - b)³ = a³ - b³ - 3a²b + 3ab²