Question

Heyy!!✋✋

${(l + m)}^{2} - 4lm$
Solve the following question with proper steps.


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Answer 1

Ф  (l + m)² - 4 l m

 = l² + m² + 2 lm - 4 lm

= l² + m² - 2 l m                   ∵    [ a² + b² - 2 ab = (a -b)² ]

= (l -m)²

= (l -m)(l -m)

Ф 16 x⁵ - 144 x³

 = 16 x³ (  x² - 9)

= 16 x³ [x² - 3² ]                              ∵ [ a² - b² = ( a +b )(a -b)]

= 16 x³ ( x + 3)(x - 3).

Thank You ❤❤.