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3 years ago

Solve the equation 9x² – 29x – 28 = 0 Give your answers to 2 decimal places when appropriate

Mathematics

1 answer:

andrew-mc [135]3 years ago

4 0

Answer:

x = 4 or x = 0.78

Step-by-step explanation:

9x² – 29x – 28 = 0

2 roots: x = ((-(-29) ± √(-29)² - 4 x 9 x (-28)) / (2 x 9)

= (29 ± √841 + 1008) / 18

= (29 ± 43) /18

x = 72 /18 = 4 or

x = -14 /18 = - 0.78

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