2 years ago

What 2 numbers multiply to make -30 and combine to make -7? and Help PLEASEE

Mathematics

2 answers:

alisha [4.7K]2 years ago

8 0

Answer:

-10 and 3

Step-by-step explanation:

-10 x 3 = -30

-10 + 3 = -7

Leno4ka [110]2 years ago

8 0

Answer: -10 and 3

Step-by-step explanation:

-10 x 3 = -30 and -10 + 3= -7

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Find the inverse Laplace transform f(t) of the function F(s). Write uc for the Heaviside function that turns on at c, not uc(t).

zzz [600]

Answer:

F(t) $=\frac{-1}{2}e^{7(t-7)}+\frac{1}{2}e^{-7(t-7)}$

Step-by-step explanation:

We have given $F(S)=\frac{7e^{-7s}}{s^2-49}$

Now $F(S)=e^{-7s}G(s)$

Here $G(S)=\frac{7}{S^2-49}$

Now first find the Laplace inverse of G(S)

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On comparing the coefficient

$A=\frac{1}{2}$ and $B=\frac{-1}{2}$

On putting the value of A and B

$G(S)=\frac{-1}{2(S+7)}+\frac{1}{2(S+7)}$

Taking inverse Laplace

$G(t)=\frac{-1}{2}e^{7t}+\frac{1}{2}e^{-7t}$

Now in G(s) there is onether term $e^{-7s}$

So F(t) $=\frac{-1}{2}e^{7(t-7)}+\frac{1}{2}e^{-7(t-7)}$

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What 2 numbers multiply to make -30 and combine to make -7? ____and____ Help PLEASEE

What 2 numbers multiply to make -30 and combine to make -7? and Help PLEASEE