Question

Find all the zeroes of the equation and show your work
-3x^4 + 27x^2 + 1200 = 0

Answer 1

x=−5 or x=5

Explanation:

Step 1: Factor left side of equation.

−3(x2+16)(x+5)(x−5)=0

Step 2: Set factors equal to 0.

x2+16=0 or x+5=0 or x−5=0

x=−5 or x=5