Question

solve this equation X⁴+10X²+9=0 please

Answer 1

Answer:

answer is x=-3, -1

Step-by-step explanation:

x⁴+10x²+9=0

x⁴+(9+1)x²+9=0

x⁴+9x+x²+9=0

x²(x²+9)+1(x²+9)=0

(x²+9)(x²+1)=0

x²+9=9

x²=-9

x=-√9

x=-3

or, x²+1=0

x²=-1

x=-√1

x=-1