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# Core 1 Differentiation question help watch

1. Χαίρετε,

"Find the co-ordinates of the point on the curve with equation y=x^2 + 5x -4 where the gradient is 3".

I have differentiated the equation to get 2x + 5 and then worked out that the x coordinate is -1 but I am not sure how to find out what the y coordinate is. Any help will be appreciated

Thankyou
2. (Original post by jessyjellytot14)
Χαίρετε,

"Find the co-ordinates of the point on the curve with equation y=x^2 + 5x -4 where the gradient is 3".

I have differentiated the equation to get 2x + 5 and then worked out that the x coordinate is -1 but I am not sure how to find out what the y coordinate is. Any help will be appreciated

Thankyou
x and y are related by the equation

so all you have to do is substitute the x-value in

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