Solve for x: x^4-15X^2+14=0
How would I solve this problem? Could someone please show me the steps?
2 answers
Enter the equation into a graphing calculator. Then use the zero function under the 2nd Trace menu. Find the zeros.
Or, notice that it's just a quadratic in x^2:
(x^2 - 14)(x^2 - 1) = 0
x = ±√14 or ±1
(x^2 - 14)(x^2 - 1) = 0
x = ±√14 or ±1
2 answers