Answer:
thats a cone
Step-by-step explanation:
Answer:
Step-by-step explanation:
x + x + 36 = 180
2x + 36 = 180
2x = 144
x = 72
Answer:
The roots are
x=±√3,1±√6i
Step-by-step explanation:
(x2+a)(x2bx+c)=0
Multiply the two quadratics.
x4+bx3+(a+c)x2+abx+ac=0
Comparing terms gives.
b=−2,a+c=4,ab=6,ac=−21
We have
b=−2, ab=6
means that
a=−3.
now:
a+c=4 means c=7.
Verify with the last term
ac=−3⋅7=−21.
So the equation factorises to.
(x2−3)(x2−2x+7)=0
Factorise each term to give the roots.
x2−3=0, is x2=3, roots x=±√3x2−2x+7=0
complete the square
(x−1)2=−6
gives complex roots
x=±√6i
