2 years ago

If -1 is zero of polynomial p(x) =ax square -3(a-1)x-1 then find the value of a.

Mathematics

1 answer:

frez [133]2 years ago

6 0

Answer:

a = 1

Step-by-step explanation:

Since x = - 1 is a zero of p(x) then p(- 1) = 0

Substitute x = - 1 into p(x)

p(- 1) = a(- 1)² - 3(a - 1)(- 1) - 1 = 0, that is

a + 3(a - 1) - 1 = 0

a + 3a - 3 - 1 = 0

4a - 4 = 0 ( add 4 to both sides )

4a = 4 ( divide both sides by 4 )

a = 1

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Four Friends decided to host the grand opening of their bar on St. Patrick’s Day. They built their bars at different distances f

klio [65]

John's Bar 60 km away from Ben's Bar.
Doug's Bar is 40 km away from Kieran's Bar
John's Bar is 10 km nearer to Doug's Bar than Kieran's Bar

If I am to assume that these bar are in a liner position,

Ben's Bar Kieran's Bar John's Bar Doug's Bar
************* 60km*******************

*****************40 km ********************

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8 0

2 years ago

2x – 4 = 6<br> The answer is 10, but I just need a step by step explanation for this

vazorg [7]

Answer:

x=5

Step-by-step explanation:

2x – 4 = 6

Add 4 to each side

2x – 4 +4= 6+4

2x = 10

Divide each side by 2