Question

For which value of x does the graph of y = 2x^2 − 7x + 6 cross the x-axis?

Answer 1

The line would cross the x-axis when y = 0. Set, the equation equal to zero and solve for x.\[0 = 2x^2 − 7x + 6\]

Answer 2

wat do u mean by crossing x axis? do u mean at what points the graph touches x axis?

Answer 3

@pfenn1 would I solve using -b (sqrt) b^2 - 4ac?

Answer 4

Sure.

Answer 5

yep equate the quadratic to 0 ,the roots will be those points where the parabola touches the x axis

Answer 6

I've got down to -49 - 48...

Answer 7

@pfenn1 @AravindG

Answer 8

Hmmmm. That isn't what I got. I used....\[x=\frac{7\pm \sqrt{7^2-4(2)(6)}}{2(2)}\]

Answer 9

12 * -4 is -48. 7*7 = 49. 49 - 48 / 4

Answer 10

it'd be 4.

Answer 11

I got 2 answers, 3/2 and 2.