Answer:
x = -9
x = 2
Step-by-step explanation:
We can say that:
x (x + 7) = 6*3
x² + 7x = 18
x² + 7x - 18 = 0
Now solving by quadratic formula we get;
x = 2, and -9
if we substitute in -9 for x, let's see what happens:
(-9) (-9 + 7) = 6*3
(-9) (-2) = 6*3
18 = 18
therefore x = -9 works! Let's see what happens if we substitute x in for 2;
(2) (2 + 7) = 6*3
(2) (9) = 6*3
18 = 18
Therefore x = 2 works as well!
The final answer would be;
x = -9
x = 2
Hope this helps!