+1004 Find the discriminant of the quadratic 5x^2 - 2x + 8 - 2x^2 + 6x + 2 - 2x^2 + 4x - 1.
+1953 Tottenham10, you did a great job with simplifying the quadratic, but there was one tiny mistake.
The descriminant is b2−4ac, not √b2−4ac. Other than that, you're good!
So, now we...
First, let's combine all like terms. We get;
x2+8x+9
Now, the decriminant is b2−4ac for any quadratics in the form of ax2+bx+c
Thus, plugging in the numbers in the quadratic we have, we get
82−4(1)(9)=64−36=28
So 28 is our answer.
Thanks! :)
+49 If we combine all the like terms, the expression turns into x2+8x+9. The discriminant is √b2−4ac, so if we just plug in the values, we get √64−36=√28=2√7.
Feel free to tell me if I made a mistake! :D
+1953 Tottenham10, you did a great job with simplifying the quadratic, but there was one tiny mistake.
The descriminant is b2−4ac, not √b2−4ac. Other than that, you're good!
So, now we...
First, let's combine all like terms. We get;
x2+8x+9
Now, the decriminant is b2−4ac for any quadratics in the form of ax2+bx+c
Thus, plugging in the numbers in the quadratic we have, we get
82−4(1)(9)=64−36=28
So 28 is our answer.
Thanks! :)
