Finf the gradients of the lines with y-intercept 1 that are tangents to the curve y=3x^2+5x+4.
do it with the full explanations for the solutions

now, we know that derivative will give us the slope, so long we have an x-value.

a line with an y-intercept at 1, will have a point of (0,1), since that's the y-intercept at 1, so let's plug that point and slope in the point-slope form.

since "y" is that equivalent at (0,1) then, let's plug that in our original equation, and solve for "x" to see what our "x" might be.

answear:

a

step-by-step explanation: a

i belive those are the ones that are under 90 degreese.