joejo1688
07.02.2021 •
Mathematics
Solve x2 - 8x - 9 = 0.
Rewrite the equation so that it is of the form
x2 + bx = c.
-8 and 9
Add _ to each side x2 – 8x = 9 to complete the square.
16
Now that you have x² - 8x + 16 = 9 + 16, apply the square root property to the equation.
(x - 4)^2 = 25
Choose the solutions to the quadratic equation
x2 – 8x – 9 = 0.
-1 and 9
Solved
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Ответ:
honestly i did it wrong most likely so just read the comment above