Question

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Answer 1

Answer:

This may help you

look it once.

Answer 2

$\huge{ \mathfrak{ \underline{ Answer} \: \: ✓ }}$

Question 1 :

$\small(a {}^{2} b {}^{2} + 1 + ab - c)(a {}^{2} {b}^{2} + 1 - ab + c)$

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$\small a⁴b⁴ + 1 + a²b² - c² + 2abc$

$\small( a⁴b⁴+ 1 ) + a²b² - c² + 2abc$

$\small[ (a²b²)² + 1² ] + a²b² - c² + 2abc$

$\small(a²b² + 1 + 2a²b² - 2a²b²) + a²b² - c² + 2abc$

$\small(a²b² + 1)² - 2a²b² + a²b² - c² + 2abc$

$\small(a²b² + 1)² - a²b² - c² + 2abc$

$\small(a²b² + 1)² - (a²b² + c² - 2abc)$

$\small(a²b² + 1)² - (ab - c)²$

$\small(a²b² + 1 + ab - c) (a²b² + 1 - ab + c)$

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