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jonny [76]
3 years ago
13

Solve the system using elimination y=-3x+6 y=x^2-4

Mathematics
1 answer:
ElenaW [278]3 years ago
8 0
Mutiply first equation by -1 and add to 2nd

-y=3x-6
<u>y=x^2-4 +</u>
0=x^2+3x-10
factor like any equation
what 2 numbers multiply to -10 and add to 3
-2 and 5
0=(x-2)(x+5)
set to zero
x-2=0
x=2

x+5=0
x=-5
solve for y in each case

for x=2
y=2^2-4
y=4-4
y=0
(2,0) is a point

for x=-5
y=(-5)^2-4
y=25-4
y=21
(-5,21) is another



the solutions are
(2,0) and
(-5,21)
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An ANOVA procedure is used for data that were obtained from four sample groups each comprised of five observations. The degrees
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Step-by-step explanation:

The degrees of freedom of the critical value F are (k-1,n-k).

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Explanation:
I used factor by grouping. You multiply the first term (2) by the last term (6). This gives you 12 then take the factors of 12 that add up to the middle term 8. You get 6 and 2.
It should look like 2x^2+6x+2x+6=0
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