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Factorisation Using Algebraic Identities

If x4 - 4x3...

Question

If $x^{4} - 4 x^{3} + 10 x^{2} - a x + b$ is a perfect square, then find the values of $a$ and $b$

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Solution

Since the given polynomial is perfect square
$∴ - a = - 12, b = 9$
$a = 12$

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