Factor: 3k^2+72=33k

It's like

x^2+22x+121=0

(x+11)      (x+11)

x+11=0     x+11=0

x=-11         x=-11

x=-11

 

but I don't know what to do if it equals 33k.... Do I just move it?
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1 Answer

3k^2 - 33k + 72 = 0

3(k^2 - 11k +24) = 0

3(k - 8)(k - 3) = 0

k = 8,3

OR

3k^2 - 33k + 72 = 0

3 * 72 = 216

              -24 + -9 = -33

-24/3k     -9/3k

(k - 8)(3k - 9) = 0

k - 8 = 0     3k - 9 = 0

  +8   +8         +9   +9

k = 8            (3k = 9)/3

                    k = 3
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