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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Mathematics

1 December, 20:06

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

+4

Answers (1)

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Paisley Villarreal · Answer 1

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

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

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