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Dima020 [189]
3 years ago
11

The first step in the process for factoring the trinomial x2-3x - 40

Mathematics
1 answer:
Alexxx [7]3 years ago
3 0
We need two numbers that when multiplied will give you -40 and when added will give you -3:
(x+5) (x-8) this is your answer. And you want to know the process Here it goes. And attached is a chart I made you so you can visually see what this process is telling you:
1) identify a,b, and c in the trinomial ax^2 + bx+c (in your case it's 1x^2-3x-40= x^2-3x-40)
2) write down all factor pairs of c (numbers that multiplied produce -40)
3) identify which factor pair from the previous step sums up to b
4) Substitute factor pairs into two binomials
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Answer:

v(-3)=23\\v(0)=14\\v(4)=2

Step-by-step explanation:

v(x)=14-3x

v(-3)=14-3(-3)\\\\v(-3)=14-(-9)\\\\v(-3)=23

v(0)=14-3(0)\\\\v(0)=14-0\\\\v(0)=14

v(4)=14-3(4)\\\\v(4)=14-12\\\\v(4)=2

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