Solve the following equation for $b$b using the PSF method of factorisation: $15-11b-12b^2=0$15−11b−12b2=0

Write all solutions in fraction form, on the same line separated by commas.

Solve the following quadratic equation:

$20x^2-24x+1=-5x^2-4x-3$20x2−24x+1=−5x2−4x−3

Solve for the unknown, leaving your answer in exact form.

$-3x=\left(3x+5\right)\left(x-1\right)$−3x=(3x+5)(x−1)

The sum of two integers is $70$70.