Question

o valor de k de modo que 2 seja raiz de p(x)=×3+3×2+kx-10 vale

Answer 1

p(x)=x³+3x²+kx-10

se 2 for raiz p(2)=0

p(2)=(2)³+3(2)²+k.2-10=0

8+3.4+2k-10=0

8+12+2k-10=0

2k=10-8-12

2k=-10

k=-10/2

k=-5