I'm not good at quadratics at all, especially factoring simple problems...
ex. factor 8k2 - 6k - 5
ax2 + bx + c = 0
ac = -40 b = -6
find two numbers that the product is -40 and sum is -6
+4 and -10
8k2 + 4k - 10k - 5
group like terms and then factor: This is the step I do not know how to do...
The answer is (4k - 5)(2k - 1)
Also, I have know clue where to start on this one:
0.4m2 + 0.6m -1.8