Question

factorise the following: x⁴-9x²​

Answer 1

Answer:

x⁴- 9x²

=(x²-3x)²

=(x²)²-2×x²×3x+(3x) ²

= x⁴- 6x³+9x²

thnk u

Answer 2

Answer:

x=0,3,-3

Step-by-step explanation:

x∧4-9x²=0

x²(x²-9)=0

x²[x²-3²]=0                                                      

x²(x-3)(x+3)=0                                                ∵ [a²-b²=(a+b)(a-b)]

x=0,3,-3