Question

expand and find the (a+b)²​

Answer 1

Answer:

a²+2ab+b²

Step-by-step explanation:

(a+b) ²

a²+b²

a²+2ab+b²

Answer 2

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$(a + b) {}^{2} = a {}^{2} + b {}^{2} + 2ab$

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⟼(x + y)²= x²+ 2xy + y²

⟼(x – y)² = x²– 2xy + y²

⟼x² – y²= (x + y) (x – y)

⟼(x + a) (x + b) = x2 + (a + b)x + ab.

⟼(x + y + z)² = x²+ y²+ z²+ 2xy + 2yz + 2zx.

⟼(x + y)³ = x³ + y³ + 3xy(x + y)

⟼(x – y)³ = x³ – y³ – 3xy(x – y)

⟼x³ + y³+ z³– 3xyz = (x + y + z) (x² + y² + z² – xy – yz – zx)