Question 512034
x+30 = x^2 -12
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x^2 -x -42 = 0
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(x-7)(x+6) = 0
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x = 7 or -6
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Test to see if both are correct.
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7+30 = 37
7*7 = 49
49-12 = 37
correct
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-6+30 =24
-6*-6 = 36
36-12 =24
correct.
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Answer:  Both 7 and -6 are solutions.
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Done.