Question

(l+m)^2-(l-m)^2 you solved this question?step by step

Answer 1

as we know that

(a+b)²-(a-b)² = 4(a+b)

so ,

(l+m)²-(l-m)²= 4(l+m)

Answer 2

Solution ●●●●
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$Since \: \: {a}^{2} - {b}^{2} = (a + b)(a - b)$
Now ,

$= [(l + m) + (l - m)][(l + m) - \\(l - m) ]\\ \\ = (l + m + l - m)(l + m - l + m)$

$= 2l \times 2m \\ \\ = 4lm$
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I hope it will help you
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