Question

(3x + 4y)^3 + (3x - 4y)^3 simplify this question ​

Answer 1

The answer is 54x³

Step-by-step explanation:

(3x + 4y)^3 + (3x - 4y)^3

(3x)³+(4y)³ + 3•3x•4y(3x + 4y) + (3x)³+(4y)³ – 3•3x•4y(3x–4y)

(3x)³+(4y)³+(3x)³–(4y)³

27x³+64y³+27x³–64y³

54x³

[INDENTITY : (a+b)³ = a³+b³+3ab(a+b)]

[IDENTITY : (a–b)³ = a³–b³+3ab(a–b)]