Question

(l+m)square - (l-m) square=?

Answer 1

(1+m)2-(1-m)2 =1+m2+2ml-1-m2+2ml

=4ml

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Answer 2

HOLA USER ✌

HERE'S YOUR ANSWER FRIEND,

GIVEN : QUESTION,

(l + m)² - (l - m)² = ?

SOLUTION

==> BY USING THE IDENTITY (a + b)² = a² + 2ab + b²

WE HAVE,

(l + m)² - (l - m)²

==> l² + 2lm + m² - (l² - 2lm + m²)

==> l² + 2lm + m² - l² + 2lm - m²

REARRANGING THE TERMS WE HAVE,

==> l² - l² + 2lm + 2lm + m² - m²

==> 0 + 4lm + 0

==> 4lm

IS THE REQUIRED ANSWER.

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