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katen-ka-za [31]
3 years ago
10

Find p(-1) and p(5) for the function p(x)= 9x to the 4th power+9x to the third power- 11x to the 2nd power+12x+5

Mathematics
1 answer:
sergey [27]3 years ago
7 0

Answer:

P(-1) = -18

P(5) = 6540

Step-by-step explanation:

Given the polynomial function

P(x) = 9x⁴+9x³-11x²+12x+5

We are to find p(-1) and p(5)

P(-1) = 9(-1)⁴+9(-1)³-11(-1)²+12(-1)+5

P(-1) = 9(1)+9(-1)-11(1)-12+5

P(-1) = 9-9-11-12+5

P(-1) = -23+5

P(-1) = -18

Get p(5)

P(5) = 9(5)⁴+9(5)³-11(5)²+12(5)+5

P(5) = 9(625)+9(125)-11(25)+65

P(5) = 5625+1125-275+65

P(5) = 6540

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So we set up the equation;

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Step-by-step explanation:

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Please help i have exam tom. ​
Xelga [282]

Answer:

Step-by-step explanation:

this is a simultaneous equation question

f(1)=8  so  a(1) + b = 8

f(4)=17 so a(4) + b = 17

can you figure this out from here ???

if you can't below is how to solve it

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a + b = 8

4a+b=17

multiply the top equation by 4 and then subtract the bottom one from the top

4a+4b = 32

-(4a +b = 17)

3b = 15

b=5

now plug 5 into the first equation

a + 5 = 8

a=3

there you go :)

3 0
3 years ago
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