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Illusion [34]
3 years ago
5

Will get brainliest!!!!! Will report bots

Mathematics
2 answers:
Klio2033 [76]3 years ago
8 0

Answer:

x^2+x-20=0

x^2+5x-4x-20=0

x(x+5)-4(x+5)=0

(x+5)(x-4)=0

Thereforex=-5 ,x=4

NeX [460]3 years ago
7 0

Answer:

x= -5 or x=4

Step-by-step explanation:

Lets first turn this into quadratic formula form

(-1 ±\sqrt{1^2-4*1*-20}) / 2

(-1 ± 9 )/2

-10 / 2   =x or 8/2 =x

x= -5 or x=4

It was hard to type it in the comments hope this helped

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[URGENT]
Blizzard [7]

When you write URGENT the Brainly cops think you may be taking a test.

y = ax² + c thru (-1,4) and (0,8)

Substituting in the coordinates of each point for x and y gives two equations:

4 = a  (-1)² + c

8 = a (0²) + c = c

From the second one we see c=8.  Substituting into the first one,

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Check:

f(x) = -4x² + 8

f(0) = 8, good

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