Lets work out each set of brackets individually:
8 x 10 = 80
4 x 1 = 4
For the last bracket, note that: 2 times 1/100 is the same as 2 divided by 100
So:
2 x 1/100 = 2 ÷ 100
= 0.02
Now add up all of the numbers we worked out:
80 + 4 + 0.02 = 84 + 0.02
= 84.02
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Answer:
C. 84.02
Answer:the X factor is 7
Step-by-step explanation:
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
Talk with them and discuss an agreement to come to.
