Question

How do you factor 10a^2+a-3

Answer 1

10a^2+a-3 = 10a^2-5a+6a-3 = 5a(2a-1)+3(2a-1) = (5a+3)(2a-1)

Answer 2

make sence? I used the "AC" method.

Answer 3

can you tell me by sum and product?

Answer 4

i dont know what that means

Answer 5

okay nvm, thank you though :)

Answer 6

ok I read a little sum of roots is -b/a so in our situation we have -1/10
sum of roots says the two roots we find should add to -1/10, the roots i found are
5a+3=0 so a = -3/5
2a-1 = 0 so a = 1/2
so we add them-3/5+1/2 = -6/10 + 5/10 = -1/10
so sum of roots works out
product of roots says that (-3/5)(1/2) should equal c/a or -3/10 so we check
(-3/5) * (1/2) = -3/10

Answer 7

im not sure if this is what your asking, but hope it helps