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NeTakaya
3 years ago
8

Let f(x) = x^2 - 2x a. Find and simplify f(5) b. Find the value of x such that f(x)=3

Mathematics
1 answer:
likoan [24]3 years ago
5 0
A) f(5)= 5^2 -2•5= 25-10=15
b) x^2 -2x-3=0
(x-3)(x+1)=0 so
x=3 and x=-1 are the solutions
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3 consecutive odd integers such that the sum of twice the first and three times the second is 55 more than twice the third
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Answer:

Consecutive odd integers are 19 , 21 & 23

Step-by-step explanation:

Let the first 3 consecutive odd intergers be x , (x + 2) and (x + 4).

According to the question,

2x + 3(x + 2) = 2(x + 4) + 55

=  > 2x + 3x + 6 = 2x + 8 + 55

Eliminating 2x from both the sides,

=  > 3x + 6 = 63

=  > 3x = 63 - 6 = 57

=  > x =  \frac{57}{3}  = 19

So, the consecutive odd integers are = 19 , 21 & 23.

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