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Y = 2x2 - 3x - 20? A) x = -5 and 2 B) x = 5 and -2 C) x = -2.5 and 4 D) x = 2.5 and -4
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Y = 2x2 - 3x - 20?

A) x = -5 and 2
B) x = 5 and -2
C) x = -2.5 and 4
D) x = 2.5 and -4

User Geo P
by
7.7k points

1 Answer

4 votes
2x² - 3x - 20

40
2 20
4 10
5 8

2x² - 8x 5x - 20
2x(x - 4) 5(x - 4)
(2x + 5) (x - 4)
2x + 5 = 0 x - 4 = 0
2x = -5 x = 4
x = -5/2
C) x = -2.5 and 4
User MSaudi
by
8.6k points
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