Assuming you are trying to find the values of x:
x^2+17x+72=12
-12 -12
x^2+17x+60=0
checking factors 5, 12:
5*12=60, 5+12=17
(x+5)(x+12)=0
set both parts = to 0:
x+5=0
x=-5
x+12=0
x=-12
Answer:
x=-12, -5
x = -5 or x = -12
Explanation:
Subtract 12 from both sides.
x^2+17x+72-12 = 12-12
Then factor the left side of the equation
(x+5)(x+12) = 0
Then set the factors equal to 0
(x+5)=0 or (x+12)=0
Therefore x=-5 or -12
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