Question

Viết các biểu thức sau về hằng đẳng thức:

a, 9x^4-12x^5+4x^6

b, x^10-4x^8+4x^6

c, 9x^6-12x^7+4x^8

Answer 1

a, \(9x^4-12x^5+4x^6=x^4\left(9-12x+4x^2\right)=x^4\left(3-2x\right)^2\)

b, \(x^{10}-4x^8+4x^6=x^6\left(x^4-4x^2+4\right)=x^6\left(x^2-2\right)^2\)

c, \(9x^6-12x^7+4x^8=x^6\left(9-12x+4x^2\right)=x^6\left(3-2x\right)^2\)

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