How do you find the LCM for $2 r + 2$ $2r+2$ , $r^{2} + r$ $r^2+r$ and $r + 1$ $r+1$ ?

Question

3242 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2018-05-02T05:52:03

$L C M = 2 r \cdot (r + 1)$ $color(maroon)(L C M = 2r * (r + 1)$

$2 r + 2 = 2 \cdot (r + 1)$ $2r + 2 = 2 * (r + 1)$

$r^{2} + r = r \cdot (r + 1)$ $r^2 + r = r * (r + 1)$

$Three terms are 2 \cdot (r + 1), r \cdot (r + 1), 1 \cdot (r + 1)$ $"Three terms are " 2* (r + 1), r * (r + 1), 1 * (r + 1)$

#"since " (r + 1) " is common in all the three terms",

$:. L C M = (r + 1) * 2 * r * 1 = 2r * (r + 1)$

How do you find the LCM for 2r+22r+22r+2, r^2+rr2+rr^2+r and r+1r+1r+1?