Question

Factorize:
9x^4 - 40x^2 + 16

Answer 1

Step-by-step explanation:

9x^4-40x^2+16=0

9x^4-(4+36)x^2+16=0

9x^4-4x^2-36x^2+16=0

x^2(9x^2-4)-4(9x^2-4)=0

(9x^2-4)(x^2-4)=0

either,

9x^2-4=0. or. x^2-4=0

9x^2=4. x^2=4

x^2=4/9. x=√4

x=√4/9. x=+_2

x=+_2/3