Question

factorise the following expression L + M whole square - L-M whole square

Answer 1

(L+M)² - (L-M)²,


[(L+M)+(L-M)] [(L+M)-(L-M)],

2L × 2M,

4LM

Answer 2

$\huge\boxed{\texttt{\fcolorbox{Red}{aqua}{Hey Mate!!!}}}$

$<b><i><font face=Copper black size=4 color=blue>$ Here is your answer.
$(l + m) {}^{2} - (l - m) {}^{2} \\ = (l + m + l - m)(l + m - (l - m)) \\ = (2l)(l + m - l + m) \\ = (2l)(2m) \\ = 4lm$

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