Question

How do you solve the equation for y: `x^2+17x+72=0`?

Answer 1

Solve `y = x^2 + 17x + 72 = 0`

Explanation:

`y = x^2 + 17x + 72 = 0.`
I use the new Transforming Method (Google, Yahoo Search)
Find 2 numbers knowing sum (17) and product (72). Both real roots are negative (Rule of Signs).

Factor pairs of 72 -> ...(-4, -18)(-6, -12)(-8, -9). This sum is -17 = -b.

Then, the 2 real roots are:`-8 and -9.`