Question

y=(x-2/3)(x+4). Find x when y=0

Answer 1

x= 2/3, -4

Answer 2

If y = 0, then x-2/3 = 0 and x+4=0

Answer 3

how did you get it

Answer 4

oh so dont multiply the two equations

Answer 5

Well if (a+1)(a+2)= 0

Then you can think that if one of them equals 0 then it doesnt matter what the other is. (0 times anything = 0)

Answer 6

No you dont have to multiply.

so you break that down and say, a+1 =0 because if it does equal zero, a+2 can be anything and the answer will still come to 0.

Answer 7

oh okay! I have another question kinda similar that I am going to post