# How do you solve #a^2+a-30=0#?

##### 2 Answers

Jul 8, 2015

Solve

#### Explanation:

Find 2 numbers knowing sum (-1) and product (-30). Roots have opposite signs.

Factor pairs of (-30) --> ....(-3, 10)(-5, 6). This sum is 1 = b.

Then the 2 real roots are the opposite:

Jul 8, 2015

Factor the trinomial into two binomials. Set each binomial equal to zero and solve for

#### Explanation:

Find two numbers that when added equal

The numbers

Set

Set