Answer:
2 x 20
Step-by-step explanation:
2 x 20 = 40
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
Answer:
v=99
Step-by-step explanation:
just times the two numbers
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Elza [17]
If you need to simply the expression it would be 21+12x
Answer:
A) LaTeX: \frac{5}{6} 5 6 feet
Step-by-step explanation:
Kiran has 10 1/2 feet of lumber and wants to make a bookshelf.
Kiran needs two side panels that are each 5 2/3 feet.
1 side panel = 5 2/3 feet
2 side panels =
2 × 5 2/3
2 × 17/3
= 34/3
= 11 1/3 feet
Kiran would need 11 1/3 feet of lumber.
Kiran already has 10 1/2 feet
How much more lumber does Kiran need in order to make the side panels?
This is calculated as:
11 1/3 - 10 1/2
11 - 10 + (1/3 - 1/2)
1 + ( 2 - 3/6)
1 + (-1/6)
1 - 1/6
= 5/6
Hence, Kiran need 5/6 feet more of Lumber.
