Question

How many solutions are there for the equation? x2 + 9x = -7

Answer 1

have you tried factoring it?

Answer 2

if you have, try using the quadratic equation

Answer 3

If you use the discriminant \[b ^{2}-4ac\] and substitute the numbers in you get \[9^{2}+(-4x1x7)\] which equals 49-28 which = 21.

because 21 is > 0 there are two possible answers.

Those answers being -8.14005494464025 and -0.859945055359741