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Show that the curve with equation y=x^2-6x+9 and the line with equation y=-x do not intersect.

First, you equate the 2 equations to get this single quadratic equation (x^2-5x+9=0). And then evaluate the expression b^2-4ac. If b^2 -4ac is < 0 then they do not intersect. In our case b^2 -4ac is -9, w...
FK
Answered by Foday K. • Maths tutor
4775 Views

Dans ce texte sur la publicité, remplissez les blancs avec la forme correcte des mots.

Le régime 5:2 est ( devenu ) _ à la mode ces dernières années. (devenir)2. Ce régime prône deux jours de détox par semaine contre cinq jours d’alimentation ( équilibrée ) _ . (équilibré)3. Certes, il ( prome...
SB
Answered by Sofia B. • French tutor
3800 Views

The line L has equation 7x - 2y + 11 = 0, Find the gradient of l

First rearrange the equation to get 2y = 7x + 11.Then divide through by 2 to get the equation for y: y=7x/2 +11/2Now differentiate with respect to x to find the gradient function: dy/dx=7/2 + 0We have found ...
GH
Answered by Gabriel H. • Maths tutor
5216 Views

How do you know if a stationary point on a curve is a maximum or minimum without plotting the graph?

Once you have found the stationary point of the equation by differentiating the equation and equating it to zero. You can then find out if the point you have found is a maximum, minimum or point of inflectio...
SG
Answered by Sam G. • Maths tutor
5038 Views

How do I plot a graph of y=x^3-9x?

To begin with we see that y=x 3 -9x is a positive cubic function, and therefore we know its general shape.The first step is to find the x interecepts. We do this by setting y=0 and solving the resulting equa...
TD
Answered by Tutor127548 D. • Maths tutor
9167 Views