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25-03-2021
Mathematics

contestada

Find the zeroes of the polynomial using the quadratic formula.

2x2 − 3x − 15 = 5

11

−5/2

5

4

Respuesta :

26-03-2021

Answer:

Step-by-step explanation:

2x² - 3x - 15 = 5

2x² - 3x - 20 = 0

Quadratic formula

x = [3 ± √(3² – 4·2(-20))] / [2·2]

= [3 ± √169] / 4

= [3 ± 13] /4

= -2.5, 4

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