IMathAS-libretexts

Solve by the quadratic formula: $\displaystyle -{9}{x}^{{2}}={15}{x}+{4}$

x =

[more..]

\displaystyle

Enter your answer as a list of values separated by commas: Example: -4, 3, 2
Enter each value as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4)
Enter DNE for Does Not Exist, oo for Infinity