Question

45a^2-87a-42

Answer 1

I think your question is how to solve for a....use the quadratic formula

Answer 2

my bad im factoring by grouping

Answer 3

ok...what have you tried?

Answer 4

3 will go in to them all then i figured 14 & 15 for the middle numbers n now im stuck bc my teacher said we have no prime
if you do -14 times-15 you get postive 210 i need 210 negative 210. and negative -29 -14-15 makes postive 1 n -14-15 makes -29 but it makes 210 postive ??

Answer 5

someone help me for a medal

Answer 6

? do what?

Answer 7

you are close...
factor out the 3 and you have 3(15a^2 - 29a -14)
Now what factors of 15 do you want to try?

Answer 8

you have two choices 1, 15 or 3, 5

Answer 9

I will give you a hint try..
3 ( 3a - ?)(5a +?)

Answer 10

i was taught i have to mutlipy the 14 and 15 and that give me -210