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Andre45 [30]
3 years ago
15

Multiply and Solve (6−i)(−7−9i)

Mathematics
2 answers:
ElenaW [278]3 years ago
7 0

Answer:

x = -4

x = -11/9 = -1.222

Step-by-step explanation:

(6−i)(−7−9i)

= -42 - 54i +7i + 9i^2

= -42  - 47i + 9i^2

x = -4

x = -11/9 = -1.222

brainliest please :)

alexandr1967 [171]3 years ago
5 0
- 42 - 9i^2 I Hope this helps :)
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(−t 4 −5t 3 −10t 2 )+(9t 3 +3t 2 −1)
klemol [59]

Answer:

\left(-t^4-5t^3-10t^2\right)+\left(9t^3+3t^2-1\right)=-t^4+4t^3-7t^2-1

Step-by-step explanation:

Given the expression

\left(-t^4\:-5t^3\:-10t^2\:\right)+\left(9t^3\:+3t^2\:-1\right)

Remove parentheses:  (a)=a

=-t^4-5t^3-10t^2+9t^3+3t^2-1

Group like terms

=-t^4-5t^3+9t^3-10t^2+3t^2-1

Add similar elements        

=-t^4-5t^3+9t^3-7t^2-1         ∵ -10t^2+3t^2=-7t^2

Add similar elements        

=-t^4+4t^3-7t^2-1                  ∵  -5t^3+9t^3=4t^3

Thus, the equivalent expression in simplified form:

\left(-t^4-5t^3-10t^2\right)+\left(9t^3+3t^2-1\right)=-t^4+4t^3-7t^2-1

4 0
3 years ago
If EG=10 and EF=4,then FG=?
Alchen [17]
<span>FG = EG−EF
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murzikaleks [220]
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timofeeve [1]

Answer:

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