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olga nikolaevna [1]
3 years ago
5

If f(x) = 2x -­ 4 and g(x) = x^2+3, find each value. 19. (f -­ g)(x) 20. (f • g)(x)

Mathematics
1 answer:
just olya [345]3 years ago
5 0

Step-by-step explanation:

(f - g)(x) = f(x) - g(x) \\   \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: = (2x - 4) - ( {x}^{2}  + 3) \\   \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: = 2x - 4 -  {x}^{2}  - 3 \\     \red{ \boxed{\therefore (f - g)(x)  =  -  {x}^{2}  + 2x - 7}}

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dybincka [34]
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3 years ago
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3 (x+2)= 6 (x-1) +3
zzz [600]

Answer:

x = 3

Step-by-step explanation:

3(x + 2) = 6(x - 1) + 3

Divide both sides by 3.

x + 2 = 2(x - 1) + 1

Distribute the 2 on the right side.

x + 2 = 2x - 2 + 1

Combine like terms on the right side.

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Add 1 to both sides. Subtract x from both sides.

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3 years ago
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It is not hard to check.

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2 years ago
8 + 8( 8 - n ) = 40 + 8n
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3 years ago
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