Question

Make c the subject:
x=-b+(b²-4ac) divided by 2a

The brackets mean square root

Answer 1

`x=(-b+√(b^2-4ac))/(2a)\\ 2ax=-b+√(b^2-4ac)\\ √(b^2-4ac)=2ax+b\\ b^2-4ac=(2ax+b)^2\\ -4ac=4a^2x^2+4abx+b^2-b^2\\ -4ac=4a^2x^2+4abx\\ c=-ax^2-bx`