Expansion of $(a - b)^{2}$ is

a^{2} - 2 a b + b^{2}

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a^{2} + 2 a b - b^{2}

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- a^{2} + 2 a b + b^{2}

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a^{2} + 2 a b + b^{2}

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Solution

The correct option is A $a^{2} - 2 a b + b^{2}$
$(a - b)^{2} = a^{2} - 2 a b + b^{2}$

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Similar questions

Q. Evaluate:

\sqrt{\frac{a^{2} + 2 a b + b^{2}}{a^{2} - 2 a b + b^{2}}}

Solve:

(a^{2} + b^{2} +2ab) - (a^{2} + b^{2} - 2ab)

Which of the following is correct?
a) $(a - b)^{2} = a^{2} + 2 a b - b^{2}$
b) $(a - b)^{2} = a^{2} - 2 a b + b^{2}$
c) $(a - b)^{2} = a^{2} - b^{2}$
d) $(a + b)^{2} = a^{2} + 2 a b - b^{2}$

Q. Question 3

Which of the following is correct?
a)

(a - b)^{2} = a^{2} + 2 a b - b^{2}

(a - b)^{2} = a^{2} - 2 a b + b^{2}

(a - b)^{2} = a^{2} - b^{2}

(a + b)^{2} = a^{2} + 2 a b - b^{2}

Q. Simplify:
(a² + b² + 2ab) − (a² + b² −2ab)

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Expansion of (a−b)2 is

The correct option is A a2−2ab+b2(a−b)2=a2−2ab+b2

Expansion of $(a - b)^{2}$ is

The correct option is A $a^{2} - 2 a b + b^{2}$
$(a - b)^{2} = a^{2} - 2 a b + b^{2}$