Question

select a suitable identity and find following products
(3k+4l)(3k+4l)

Answer 1

✔✔ Answer ✔✔

⭕ (3k + 4l)(3k + 4l) ✏ (3k + 4l)^2

⏺ Using (a + b)^2 = a^2 + b^2 + 2ab

✏ (3k)^2 + (4l)^2 + 2(3k)(4l)
✏ 9k^2 + 16l^2 + 24kl

Answer 2

$\leqslant hey \: user \geqslant$

$here \: we \: will \: use \: \\ identity \: (a + b) {}^{2} \\ as \: (3k + 4l)(3k + 4l) \\ may \: be \: written \: as \: (3k + 4l) {}^{2} \\ so \: (a + b) {}^{2} = {a}^{2} + {b}^{2} + 2ab \\ putting \: the \: value \\ = \geqslant ( {3k}^{2} ) + ( {4l}^{2} ) + 2 \times 3k \times 4l \\ = \geqslant 9 {k}^{2} + 16 {l}^{2} + 24kl \\ | \leqslant < regards \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: akshat \: rajput \geqslant > |$