Answer:
x = ±9
Step-by-step explanation:
x² - 55 = 26
+55 + 55
x² = 81
x = √81
x = ± 9
x = 9, -9
x^2 - 55 = 26
x^2 = 81.
Now, you might think that x = 9, but don't be fooled. -9 squared is also equal to 81.
So, x = 9, -9
