Question

If the line y= 4x+3 is tangent to the curve y=x^2+c, then c is...?

Answer 1

the gradient of the tangent is \[y'=2x\]
and the gradient of the line is 4
>>>equate this two to solve for x

Answer 2

So, it would be 2? @Jonask

Answer 3

yes,so now you need to find the y-value by plugging x=2 into the tangelnt line

Answer 4

Okay, which is 11?

Answer 5

yes now to find c,you need to use the point (2,11) into the curve :)

Answer 6

Thanks so much!!

Answer 7

your welcom,did u find c?

Answer 8

7?

Answer 9

yes thats perfect ...welldone