Which of the following identity can be used to factorize x2-4 y2 -A- a2-b2-a-ba-bB- a-b2-a2-2 a b-b2C- None of theseD- x-ax-b-x2-a-b x-a b

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Algebraic Identities

Which of the ...

Question

Which of the following identity can be used to factorize $x^{2} - 4 y^{2}$ ?

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= (a - b)(a + b)

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(x + a)(x + b) =

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None of these

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Which of the following identity is not applicable to simplify ${(4 x + 5 y)}^{2} - {(5 x + 4 y)}^{2}$ ?

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

(x^{2} + 5)^{2}

The length of common chord of the circles $(x - a)^{2} + y^{2}$ = $a^{2}$ and $x^{2} + (y - b)^{2}$ = $b^{2}$ is

{(a - b)}^{2}

(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}

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