Without graphing, tell how many x-intercepts y= 2x2 + 4x + 2 has.

Question

abb0t · Answer

one, and they are teh same number.

abb0t · Answer

well, two, but they are the the same number is what I mean.

parthkohli · Answer

We can let $y = 0$ and then solve $2x^2 + 4x + 2 = 0$.

anonymous · Answer

if you solve the equation, u end up with (x+1)^2, so, the the function will be satisfied by 1, but twice....so it has one x intercept

blurbendy · Answer

Two intercepts.  2x^2 + 4 x + 2.  The leading exponential power tells you how many intercepts will be present (in this case, it is 2)  For example, if it were 3x^3 it would have 3 x intercepts

anonymous · Answer

sorry, its -1

abb0t · Answer

@tanvirms how did you get -1?

anonymous · Answer

2x^2+2x+1+0
or, x^2_2x+1=0
or, (x+1)^2=0
or, X+1=0
or, x= -1

anonymous · Answer

sorry, 2x^2+4x+2=0 *

anonymous · Answer

thanks guys !