Question

De descompus in factori$16 x^{4} -9 y^{2}$$16 x^{4} -9 y^{2} ; x^{4} -16; a^{3} +1; x^{3} +4 x^{2} +4x;$

Answer 1

16x⁴-9y²=(4x²+3y)(4x²-3y)
x⁴-16=(x²+4)(x²-4)=(x²+4)(x+2)(x-2)
a³+1=(a+1)(a²-a+1)
x³+4x²+4x=x(x²+4x+4)=x(x+2)²