<span>y=x^2+2x-8
x0= -3
y= f(x0) + f '(x0)(x-x0)
f(x0)= (-3)^2+2*(-3) - 8= - 5
f ' = 2x+2
f ' (x0) = 2*(-3) +2= - 4
y= - 5 + (- 4)*(x+3)
y= - 5 - 4x -12
y= - 4x - 17</span>
<span>4(3y-1)² -18y(2y-1)=4(9у²-6у+1)-36у²+18у=36у²-24у+4-36у²+18у=-6у+4</span>