Hey this is probably really simple but I can't get my head around it.
1) Find the possible values of a for which y = ax+1 is a tangent to y = 3x²-4x+4
2) Find the possible values of k for which y = x-8 is a tangent to y= 4x²+ kx + 1
Would be really grateful if someone could just get me started and explain what to do. Thanks