Find following products: (4 x+5 y)(4 x+5 y) - Vidyadip

Question

Find following products:
$(4 x+5 y)(4 x+5 y)$

✓

Answer

$(4 x+5 y)(4 x+5 y)$
$=(4 x+5 y)^2$
$=(4 x)^2+2 \times 4 x \times 5 y+(5 y)^2$
$=16 x^2+25 y^2+40 x y$

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